We have now started up our fall season, but families can still enquire about having their children join at any time. Either phone Rob Lee at (613) 623-8123 (note that "Macoun" rhymes with "crown," not "croon"), or e-mail him at Macoun@ofnc.ca. The Macoun Club is sponsored and supported by the Ottawa Field-Naturalists' Club (OFNC); there are no fees.
Indoor meetings take place at the Fletcher Wildlife Garden building beside the Experimental Farm's arboretum (Building no. 138). Meetings start at 10 a.m. and wrap up between 11:30 a.m. and noon. Field trips take place on alternate Saturdays and typically run about 5 hours (sometimes with the option to attend only the part before or after noon). We go to wild places in Ottawa's western Greenbelt (Stony Swamp) and Lanark County (the Pakenham Hills).
|Mar. 11 - 18||March break — no meetings|
|Mar. 25, 2017||Readings from his book on bird conservation, with Rob Alvo|
|Apr. 1, 2017||Wildlife of Mongolia, with Roy John|
Our members are considered part of the Ottawa Field-Naturalists' Club and may, with their parents, join the OFNC's regular field trips. Check the OFNC events page for other upcoming events.
Conditions were almost perfect in the Pakenham hills today: a refrozen snowpack we could all walk on, with animal tracks showing in a light layer on top; brilliant sunshine to warm us (it was minus 18°C); ices as smooth as a skating rink running down a hill (for inveterate sliders); and a steady wind (to make the pines sing).
We saw all the usual tracks as we walked in: deer, hare, fox, coyote, squirrel, deer mouse, vole, shrew, fisher, turkey, and porcupine, plus raccoon, otter and ermine. After lunch, we came upon a dead muskrat with one leg chewed off. Coyote tracks were all around it. We saw a raven and an eagle, and heard a nuthatch.
It was such a beautiful day, and the leaders remembered such a special scene in a distant place, that we risked being late getting out and made for an "ice waterfall." It's a thing that can be seen only in winter, after a strong thaw, such as we've just had. A considerable quantity of melting snow on the hillside above drips over the lip of a small rock face, gradually building curtains and columns of icicles. (In summer, the water just wets the surface and drains away.)
And we were late.
Our speaker, Nick Lapointe, was himself once a member of the Macoun Club, so he was confident of having a knowledgeable audience. "What is the eel's scientific name?" Anguilla rostrata. "Where do they start from when they hatch?" The Sargasso Sea! "Where is that?" Bermuda. "Where do they go to grow up?" Rivers that empty into the Atlantic Ocean.
Macoun members who have been around long enough already knew the answers because we had heard about eels from Lauren Stoot on November 2, 2014. And even some of our newest members could answer Nick's questions from their own general knowledge. But we very quickly got beyond that. There are hints that somehow the young eels "know" which river they should ascend. We learned that in all the species' range (from Greenland to the northern part of South America), the eels of the upper St. Lawrence (including the Lake Ontario and Ottawa River watersheds) grow to be the biggest (1.1 metres) and oldest (50 years) before returning to the sea. The enormous number of eggs the huge Ottawa-River eels produced meant that they constituted a quarter of the species' reproduction. The implication for conservation is that this watershed is of outsized importance.
Historical records show the American Eel was once the dominant fish species in the Ottawa River, but almost none are left. What happened? It wasn't over-fishing, even though eels had been a major resource taken by native people in Ontario. It wasn't pollution. It wasn't habitat loss, either. The trouble — and it isn't too late to remedy it — is a series of barriers to the twice-in-a-lifetime migration of eels. In a pattern opposite to that of salmon, young eels migrate up the Ottawa, and mature eels migrate down in order to complete their life cycle. Four all but impassable hydro-electric dams bar upstream travel, and their turbines constitute a generally lethal route downstream. The second of the four is right in downtown Ottawa.
The dams were built mainly between 1900 and 1960 to generate electricity. That was before wildlife such as fish were taken into account. It is expensive to retrofit them, but the organization Nick is working for (the Canadian Wildlife Federation) has been working with the dams' owners. The Ottawa Hydro dam will soon accommodate eels traveling in both directions. Nick is involved in the further natural history research needed to give eels a reasonable chance of surviving the industrialization of one of their most important river systems.
The Sarsaparilla Trail in winter seemed like just several loops of well beaten pathways and a bunch of greedy Chickadees. The observation dock, scene of so much wildlife activity spring, summer, and fall, looked out over an unbroken expanse of snow over ice. We fed the Chickadees, and then marched out into the middle of The Big Pond. The snow out there was completely unmarked by humans, animal tracks, or even the touch of recent winds, and when we sat down for lunch, no Chickadee or squirrel dared come out so far for handouts. But there was something Rob figured we could see only there.
Rob remembered that in 1974, the ice on this pond had been 20 inches thick. In this era of global warming, with average temperatures 1° higher than they were back then — indeed, in a year when January temperatures had run about 6° above normal, and today's (at +12°) was 16° above normal — how thick would ice in the same place be? We started chopping.
It turned out to be slow work, and pretty soon everyone was eating lunch while Rob, Ulyses, and Samantha took turns swinging the axe. They broke out big chunks of ice, which were full of bubbles. That meant the ice had formed mainly by water seeping into snow, rather than water freezing directly. Finally, Ulyses punched through and hit water, which slowly welled up. The ice was a foot thick, little more than half what it was in the mid-1970s.
Rob's curiosity satisfied, we toured the northern margin of the pond where the tracks of an Otter showed how much it loves to slide along on its stomach, and flocks of Robins (more than 30 birds seen) had found food in muddy seeps below the beaver dam.
Unlike birds, most wild mammals are little seen. Some are nocturnal, some are crespuscular, some are subterranean — and a good many have reason to fear us and hide. But they are here all around us and Gordon Robertson from the OFNC reviewed our local species groups. The meeting was a great success because everyone — our speaker, our leaders, and our members — has had memorable experience with one or more of our local mammals.
In planning for today's field trip, we had to make a decision about snowshoes three days ahead of time. During January, daytime temperatures had been at or above freezing for weeks (this being about 6°C above normal), but then the weather had turned cold and added five inches of fresh snow. Would the shrunken snowpack underneath have frozen hard enough support our weight? Rob went out and walked around enough to judge the situation. He found that he could walk around easily most of the time, but sometimes sank in to his knees unexpectedly. His recommendation: snowshoes for big kids and adults, but the smallest children would be free to run around unencumbered. We dug into our supply of donated snowshoes and outfitted any big person who didn't have their own.
It turned out to be a good choice, enabling us to get well off trail for lunch. We made our cooking fires in a new spot where we could eat out of the wind and in occasional sunshine. And when we started up again, we were free to go in any direction we pleased. We slid to the bottom of a steep hill (even on snowshoes), probed both coniferous and deciduous forests, and crossed a half-drained beaver meadow. We even got into an environment destined to disappear from the earth: a Black Ash swamp.
All along the way we were crossing the tracks of the animals that occupy these woods. Those of Deer were deeply sunken into the snow, while Coyotes had trotted around on top, like our lightest kids. Two Fishers had run all through the woods; we saw their tracks often, sometimes together. A Snowshoe Hare had almost floated on top of even the powdery snow, while a Red Fox had drifted about almost as lightly. We could see where Red Squirrels had dashed from tree to tree, and a Porcupine had waddled back and forth between its den and a favourite feeding tree (a big Hemlock, reduced, after successive years of attack, to a skeletal state). We saw Wild Turkey and Ruffed Grouse tracks, too, but never a single living creature.
If you wanted to see Woodland Caribou in the wild, how could you do it? They have been pushed so back into the far reaches of Canada that in most places you'd have to fly into some northern community. But there are one or two places where you can also drive into the north. It's a long drive, but Mary Beth Pongrac set out from Ottawa in mid-December to drive the James Bay Road, a 2400-km round trip.
Mary Beth watched constantly out the windows for wildlife, and soon saw species that you just don't ever see in Ottawa. Willow Ptarmigan had come out to the road to peck at sand grains, and waded around in the soft snow to get at the buds of deciduous shrubs for food. They were in winter plumage, white as snow except for their bills and a few tail feathers. It isn't unusual for them to get hit by cars, so she had samples of their feet, densely feathered to the tips of their toes. There were other animals typical of the boreal forest, such as ravens and foxes, that no doubt patrol for roadkill. But the caribou were not wintering along the road this year and she didn't see them.
On a still day, it was the deep silence that impressed Mary Beth. She described it as being so quiet she could hear individual spruce needles falling out of the trees, and a car approaching along the road could be heard a quarter hour before it appeared in the distance.
There were animal tracks all over the place at the Study Area, but apart from a few squirrels, we really had to search to see anything with fur on it. There were the footprints of all sizes of dogs along the walking/skiing trails, deer tracks crossing those trails, and muddy raccoon footprints leading from one muddy melted-out patch to another. Luckily, Rob knew just where to search, and how. We focused on porcupines.
One of the sure places to find porcupines is up in the cedars and spruces on the wooded slope falling away to the north. We had to go off-trail for this, wading through heavy, wet snow as much as knee deep. The litter of fallen green twigs on the snow gave the animals' locations away, and seven times a search of the thickly branched, crowded treetops revealed a solitary porcupine, high up.
Our search brought us out to Pond VI and a beaver lodge. Farther up the shore freshly cut cedar stumps and drag marks of cedar branches on the snow suggested that the beaver is getting hungry. Rob, in the lead, was the only one to spot the animal as it dove from the shore into a beaver canal running under the ice.
As for squirrels, we watched a black-phase Gray Squirrel running through the treetops in a maple woods, getting closer and closer to a scraggly bundle of twigs high up in a White Birch. It paused to one side, then entered the bundle — a nest! There are so many of these clumps of debris up in trees, and one never knows whether they're active or old.
Why do puffy clouds have flat bottoms? This was just one of the many questions Rob posed as we explored different aspects of earth's atmosphere. Earth's breathable atmosphere is the only habitat we really, truly live in, but owing to the normal invisibility of air, we forget about it.
So why are clouds flat on the bottom? Rob characterized clouds as forming when bubbles of warm air break loose from the ground and rise up. We know higher places, like mountains, are colder. If there's enough water vapour in that air, as it rises past a critical altitude the vapour condenses on microscopic particles, producing visible water droplets. The visible cloud may be flat bottomed, but below that straight-line, level zone where condensation begins, the lower part of the bubble of warm, rising air may be as round as the top.
Rob presented his own photos of a variety of other phenomena, such as violent downdrafts tumbling out the bottom of a cloud, the natural blue haze of clean desert air in the Grand Canyon, and mirages of both the Mojave Desert and the Canadian Arctic.
Macouners are notorious scavengers of skulls and bones, routinely raiding a friendly trapper's carcass pile with abandon, and dragging home items that parents with more sensitive noses may relegate to the garage, the backyard, or even earthen burial. But well chosen, cleaned, and prepared specimens can be things of fascination and beauty. OFNC member Jim Montgomery has donated his own childhood collection, and came in with two other enthusiasts to share their knowledge. David Campbell is a retired zoologist from the Museum of Nature, and Mary Beth Pongrac has previously presented her own collection to us (see April 28, 2012).
What sets Jim's collection apart is the catalogue he kept of each new specimen, which allows one to pick up a Raccoon skull, no. 33, for instance, and learn that it was "found eaten (hide inside out, no meat or innards) in ravine behind Sunnybrook Hospital on April 6, 1965. Probably not run over before being eaten; no broken bones. This skull is one of the biggest I have seen."
Others had been donated, received in trade (from David Campbell), or as birthday gift ("from Mom and Dad"). With 150 specimens to chose from, our experts were able to point out the key features that separate species, and the patterns of suture fusion and tooth wear that indicate biological age.
Rob Lee lives in the forest, and today we explored part of it. We found a good lunch place where the bare deciduous trees (Sugar Maple, Beech, and Ironwood) let a little sunshine in, and a few White Pines provided dead, dry branches for a hot, steady fire. The temperature never got above freezing, but those sitting closest soon stripped off coats and boots. At the end, we used snow to douse the last flames and embers.
Then we were off, running and jumping, and zig-zagging around tangles of fallen trees. Rob led over rising ground, and then down, down to an old-growth cedar swamp, where aged specimens of these normally thin-barked trees had bark almost an inch thick. Then up over one last hill, to burst onto the open expanse of White Lake. There was ice in the bay, but open water out beyond. We looked, but there were no ducks.
We saw little wildlife this grey day — a Red Squirrel (but plenty of eaten-out cedar seeds in piles), a couple of Black-capped Chickadees, and just a few passing Ravens. Ulyses turned a rock and revealed two kinds of millipedes and a couple of Ground Beetles tucked in for the winter. There were tracks, however, in the patches of snow — Deer, Fisher, and Fox.
A month ago, Macoun member Morgan told us about an amazing travelling exhibit of 30 live reptiles that is being presented at the Museum of Nature this winter. Today we visited as a group.
With the benefit of prior experience, Morgan held intense consultations with some of the boys. Heads together, the three of them sidled along, gesticulating, and punctuating their conversation with bursts of laughter, and exclamations of "Oh! That reminds me!" Rory and Aidan told her all about how there's something in Gila Monster spit that, when refined and administered to people with addiction, "turns off" addictive cravings.
And kids with parents dragged them along, too: "Mum! Mum! Come see . . . ." And the parents would be propelled toward the objects of their fascination. They'd be brought to a Veiled Chameleon, brilliantly striped in the greens of her leafy perch, and three Frilled Leaf-tailed Geckos.
Our Study-Tree Woods is only 10 acres in extent, yet after 25 years of choosing trees, new Macoun members can still find ash trees and ironwoods that no one else has ever studied before. We spent the morning hours touring all those that current members are following (and picking new ones). One very large White Ash had split wide open and fallen in big pieces. Niccolo took it as his own and counted the exposed annual rings: the tree appeared to have been 70 years old. Ana was entranced by a Christmas Fern, bright green amid all the brown of the late autumn forest. No other member has ever chosen a fern for study before.
After lunch, we took a newly (and unofficially) developed trail north past "the waterfall" — now dry — but more often walked parallel to it. Rob was watching the crevices in the limestone escarpment for the Study Area's only Walking Ferns, without success.
We came out on the Trans-Canada Trail that forms our northwestern boundary, and —it's never been done before — then explored beyond it all the way to Robertson Road. Right away we found a massive Sugar Maple bigger than any we have seen before. Past that were blocky rock outcrops with gastropod fossils that are absent from our Study Area. And then alvar-like terrain overgrown by Jack Pines planted in the sixties.
We finished up by examining the ruins of a long-abandoned farmhouse and out-buildings (also outside our Study Area proper), including a spring-house (root cellar), barn, and silo.
We began by reviewing last week's field experiments, in which we measured the speed of sound by timing three repeat echoes off an isolated house (getting a result of 1010 feet per second). Rob explained how we can use that figure to tell how far away lightning is striking as a storm approaches. We had also heard echoes from the forests on either side of the field, at a higher pitch than those from the flat wall of the house. How come?
Then we turned to watch the famous 2007 video, "The Story of Stuff," which was written and narrated by Annie Leonard. In this animated documentary, Leonard explains the story behind the consumer society we all, willingly or not, take part in. Behind all the material things we buy is an unsustainable linear system that begins with destructive resource extraction and toxin-generating manufacturing and finishes in pollution-generating disposal.
She said that recycling by individuals like us is still important, but that what goes on in the other parts of the production-and-disposal chain is so much bigger that we have to understand and deal with that, too.
To Rob, one of the most significant elements in the story is the tale of how the system of planned obsolescence was invented. In other words, the drive to buy, consume, and throw away is somebody's idea, lived by billions of people from birth to death. This isn't "just the way the world is;" it doesn't have to be this way.
Indian River is a minor watercourse that runs slow and deep out into the farmland of Lanark County, but has its origins in springs and lakes in hilly country. We settled down for lunch in woods beside the last stretch of rushing water above miles and miles of marshy meanders. The steep valley sides seem to have protected the place from human disturbance. Big Sugar Maples and White Cedars stood close along the banks, and like the boulders, were green with thick mosses and liverworts.
Half the group had already crossed by rock-hopping or wading when Rob decided to take the rest across over a tangled log jam. From there we explored upstream, reaching a point where the tumbling water ran almost out of sight through a field of boulders. We found several dead Green Frogs, the bedraggled remains of a small bird, and one live Bull Frog. This species is so poorly adapted to low temperatures that, even at plus 10° C, this big one could only ponderously clamber out of reach among the rocks.
Going back, we had to pass through a managed Red Pine plantation on the high ground above. Selective logging had been carried out earlier this year, leaving the ground ribbed with deeply compacted skidder trails every 30 feet or so, and wood-cutting waste in every direction. Pioneer rock piles showed that this ground had been plowed; charred stumps of the original forest showed that it hadn't been fertile enough to be worth completely clearing. It must have been planted to pines 50 years ago.
What's out there as night falls? Not down here, where owls hoot and mice scurry, but up there where first one faint light and then another appears. People have been wondering in a serious way about the sun and the moon and the stars for thousands of years. Today Rob guided an exploration of the cosmos by probing and expanding our collective knowledge.
The ancient Greeks took some significant steps forward, and some back. Anaxagoris calculated the distance to the sun and said it was just a big ball of fire, and got banished from Athens for his pains; Hipparchus turned his geometric diagram around and said that because the earth was round, not flat, that what Anaxagoris had really measured was the radius of the earth. Knowing the size of the earth enabled him to use more geometry to calculate the distance to the moon (using the time the earth's shadow obscured it during lunar eclipses).
Macoun member Carter said that today we measure the distance to the moon by bouncing laser beams off it, and dividing the time taken for signal to return by two. Rob pointed out that you have to know the speed of the speed of light for that method to work, and suggested how we could calculate that with instruments no more special than an ordinary telescope and a stop watch. How? Well, you had to be there to join in the fun!
Late autumn on a cold, rainy day: what is there to see in the woods? We dragged a small sheet over the ground but collected no ticks at all. Apart from a solitary Raven circling high overhead when we walked away from the cars, there were no birds. Two types of mushrooms were seen several times: Destroying Angel and Jellied False Coral. Three individual wildflowers were in bloom: Heart-leaved Aster, Bunchberry, and Sweet White Clover. But at lunchtime on a high granite ridge covered with scattered White Pine trees and Reindeer Lichen, the gathering of firewood was interrupted by the discovery of one salamander after another. In all, four Red-backed and one Blue-spotted. (One of the Red-backed Salamanders was tiny, about 3 cm long.)
There had been enough of a lull in the days of rain for the fine pine twigs we rely on to become less soggy, but it still took much care and a couple of handfuls of birch-bark slivers to bring the fire into full strength. Then we were able to continue cooking even when the rain picked up again.
Circling, we explored new trails, and then cut cross-country once Rob and Rachel were sure of their direction. We hit on the spot where our granite ridge rises out of the ground and followed it right back to our lunch place, which lay not far off the bush road back to where we'd parked.
Quartz, olivine, garnet, pyroxene, hornblende, the micas and the feldspars — what unites them? There is an underlying order in their composition. They are all share chemically identical molecular silicate skeletons. It is said that if you get to know the minerals just named and recognize them when they appear in more complex rocks, you should be able to identify most of the rocks on the face of the earth.
As a start, from his own collections Rob handed out samples of the minerals pictured at right. He explained that the molecular building blocks of all of them are tetrahedrons — triangular pyramids — each with a single silicon atom surrounded by four of oxygen. In mica, the tetrahedron units are very strongly connected together in broad sheets, while adjacent sheets are very loosely held to each other; mica peels away thinner than paper. Clay particles are layered like this, too, allowing a mass of clay to absorb water and become squishy and capable of being molded into pottery. Rob passed around portions of prehistoric Iroquoian pots made more than 500 years ago.
In quartz (amethyst is a variety) the tetrahedra are bound to each other in three dimensions. A large specimen can be a single crystal. In chert and jasper, also considered varieties of quartz, there are millions of crystals, all microscopic. in garnet, the tetrahedra are isolated from each other.
Rob's father was an archaeologist, so he has specimens of prehistoric stone tools. He showed everyone Iroquoian arrowpoints made from chert, together with similar points he himself had made out of broken window glass. Glass is another silicate.
For hundreds of thousands of years, until metals came into use, humans shaped naturally occurring silicates into their tools. Now, several kinds of artificial silicon-based materials are used all through our material world. Pure silicon, a metalloid, is the basis for integrated circuit electronics. Zeolites are used in hair gel, non-clumping cat litter, and water filters. Silicone (silica-oxygen polymers with organic side chains) have been designed to serve as lubricants, rubber sealants, and kitchen utensils.
One hundred years ago, just after the last Passenger Pigeon and Carolina Parakeet died, rendering both species extinct, the International Migratory Birds Treaty was signed, protecting the remaining birds of both Canada and the United States where single states and provinces, and even countries had not been able to do it. Today, Rob explained how unrestrained hunting in the late 1800s and early 1900s was driving many others to extinction. In those days, people were shooting birds for food (pot hunting), slaughtering birds to make money (market hunting), killing birds to sell the feathers for decorating hats (the millinery trade), and "potting" birds just for the fun of seeing them fall.
Rob traced out a part of this history by reading aloud from a book by Jack Miner, who hunted hard for the first half of his life, but turned almost completely around and created a sanctuary for Ontario waterfowl that continues in operation to this day. Jack was born in 1865, early enough to join his father in shooting Passenger Pigeons in Ohio. When he was 14, he and his brother took up market hunting to help provide for their parents' family. "We soon became expert shots," he said, "and the result was we left a bloody trail behind us. For at least five miles around the birds appeared to fear us, and fly and scream as though Satan himself was after them." But they couldn't keep it up: "I am pleased to say that we two boys soon outgrew this murderous practice, and hunted for pleasure only."
Hunting ducks was Jack's chief joy in life, and when he got the chance he started knocking down the first Canada Geese to appear in his neighbourhood. But one day in 1903, the family of geese that he was calling down out of the sky spotted him despite his concealment and fled in panic. As he headed home empty handed, he was doing some "tall thinking" as he called it. "Why did they pass right over two other men within shooting range, and then shy before getting that close to me? Moreover, why were they so dreadfully frightened? Possibly because the leader saw one red hair of my topknot projecting from under my blanket and, to his sorrow, he had seen that fellow before. They know me as their enemy." And then he had a further thought: "If they know me as their enemy, surely they would know a friend if they had one."
Jack reflected that birds were becoming scarce: "I have seen more birds in one day, before I was ten years of age, than the average ten-year-old of the present day has seen in all his life."
He went home and dug a pond and stocked it with captive ducks and geese. Year after year he looked for wild geese to settle in with them, and in 1908 he was rewarded with a small flock. He persuaded his neighbours not to shoot them. Every year after that, more came until he had to say, "Really, I did not know there were so many Canada geese on earth." He had become their friend and protector.
For a change, we made a cross-country trip from the Greenbelt's Lime Kiln Trail north to the Wild Bird Care Centre. Only Rob knew, and he never mentioned it, but this is the terrain of the Macoun Club's old study area, the one we used from 1968 to 1970. We petitioned for a new one because this area was being despoiled by indiscriminate logging. It has some features that our current Study Area does not have: the aftermath of a recent forest fire, some well preserved fossils, vertical fissures in the bedrock, and a couple of invasive plants (Phragmites, Coltsfoot, Japanese Knotweed, and the introduced land snail Cepea nemoralis). It has also become the home of the Wild Bird Care Centre.
The route past the big cattail marsh runs right by the ruins of a lime kiln from the late 1800s; on the shaded quarry face behind the main structure, Rob named the wall of orange fuzz as the rather rare terrestrial alga Trentopolia.
Not far away was an extensive patch of cedar forest that was killed by a summertime forest fire in 2012. The bare, blackened tree trunks still stand, but the charred ground is now hidden by a chest-deep growth of Staghorn Sumac and Trembling Aspen. This was our third visit: see also Oct. 20, 2012 and Nov. 23, 2013 under Past Activities.
We examined a lot of limestone and peered into the 3- and 4-foot deep fissures where wide areas are exposed, but found good, clear fossils only at a minor exposure somewhere along one of the trails. There were delicate byrozoans, broken up crinoids (single segment rings), two species of brachiopods, and one nautiloid. All are of Ordovician age (470 million years).
We hit open water at only one point, and from an observation platform looked down on eight sleepy Mallards lined up on a floating log. Not two seconds after we turned away, there was a sudden noisy commotion behind us. All of the ducks had plunged into the water with frantic quacking — a deadly Goshawk had just sailed over them.
With warm rain expected, netting aquatic life in our Study Area seemed like a good way to put in our time. At the Sarsaparilla Trail, however, the observation dock has become so closely surrounded by tall stands of Narrow-leaved Cattails (and their hybrids) that little open water was available for our nets. We managed to catch a couple of Brook Stickleback minnows, and let them go. Working south along the shore, thick masses of Reed Canary Grass lay between us and the cattails. Only Rob found his way out to open water and he did it by walking off the end of a floating log (thereby getting a rubber-boot soaker).
As lunchtime approached, Rob changed course and led the group overland through seemingly endless thickets of Glossy Buckthorn, eventually emerging into a well remembered clearing with a small stand of Rhubarb. Samantha and Gabby happily chewed on the unsweetened stalks for a long time, even after their meal.
After one more attempt to reach water, Rob gave up on Pond I and led back past the dock and north to Pond II. It was choked with tall vegetation, too, but we hit on an old beaver canal from which we dredged up several kinds of pond snails, a bunch of Mudminnows, and three Green Frog tadpoles. The main problem was the mat of floating Frogbit plants that had to be lifted off the net in order to see anything. Owen competently reached in and plucked out a Giant Water Bug, holding it safely so that all could see.
There is a really big old ash tree by the trail, and we were saddened to see that it is half dead from the attacks of the Emerald Ash Borer. Over the years, the hollow trunk and knotholes have been home to Honey Bees, young Porcupines, and a White-breasted Nuthatch family.
Narrow-leaved Cattails and their hybrids, Reed Canary Grass, Glossy Buckthorn, and European Frogbit, as well as the Emerald Ash Borer, are all invasive species that have been substantially reshaping our Nature Study Area from what we have known it to be.