Yellow-throated Vireo

June 23, 2012.  We did the second of two Forest Bird Monitoring (FBMP) surveys early this morning; it’s been nearly three weeks since the first one.  It had been cool overnight, a blessing because it kept the mosquitoes down.

This second survey had a different feel; there was less of a sense of urgency and more of an ‘I just want you to know I’m here’ tone to bird song.  Much the same species were evident: Wood Thrush, Red-eyed Vireo, Hairy Woodpecker, Common Yellowthroat and Ovenbird among them. Later as we left the woods a Yellowthroated Vireo ushered us out, singing high up among the Sugar Maples and oaks.  Sounding a bit like a Red-eyed Vireo with a slur, they’re the Sean Connery among vireos.  Instead of a clear-toned “three eight,- eight three”  or “see me – here I am way up – tree top”  it was more like “tree ert – treeetree ert.” Yellowthroated Vireos are not as abundant as the Red-eyed Vireo and this was the first one I’d heard in my two trips into these FBMP woods, it got a wow out of me and was my Bird of the Day.

Later I walked along the river flats at the bird observatory and reveled in a perfect summer day: not too warm, a light breeze and the pervasive sweet clove-like fragrance of Common Milkweed in the air.  It’s a little odd and perhaps anachronistic that Common Milkweed should be officially a ‘Noxious Weed’.  It is one of a family of several milkweeds with attractive, though in some cases subtle, flowers, and its fragrance is among the best of summer.  Its cousin the Butterfly Weed bears large clusters of eye-popping orange flowers.

Along the path Song Sparrows and a Common Yellowthroat all watched me carefully to make sure I didn’t try to dive into the dense grape and dogwood tangles to eat their babies.

Common Yellowthroat watching me carefully

A pleasant surprise came later when I heard a Yellow-billed Cuckoo calling softly from a cluster of tall Hackberry trees and try as I might to see it, I was reminded that cuckoos prefer to be heard not seen. I watched in admiration as a Northern Rough-winged Swallow wove large, twisting, roller coaster loops over the river, swerving and stalling to catch flying insects at each turn. Its sharp, high-speed precise aerobatics are the stuff of dreams for the folks at McDonnell Douglas, Lockheed and General Dynamics.

Butterfly weed

Double-crested Cormorant

I have sometimes wondered what it takes for some of our more ho-hum birds to make the kind of impression that would qualify it as Bird of the Day status.  I did feature the European Starling one day last fall, it really stood out in its classy newly moulted plumage.  But take the Double-crested Cormorant for example; maybe if they weren’t dressed so somberly they’d be more appreciated, maybe if their guano didn’t destroy their nesting trees they’d find a place in our hearts, and just because they’re generally reviled by fishermen, boaters and lakeside property owners it doesn’t mean their mothers don’t love them. But they are what they are, and no-one seems to care for them very much.

Today on a distinctly urban errand I stopped to see if there was anything interesting out on the lake. Most of the ‘interesting’ waterfowl, things like Common Goldeneye, Bufflehead and Long-tailed Ducks have flown north to nest somewhere more secluded and traditional, somewhere that’s been a part of their genetic makeup for eons.  I wasn’t expecting much , but about half a kilometer offshore a mass of Double-crested Cormorants, about 500 by my best estimate, had gathered in a feeding frenzy, diving excitedly on a large school of small fish.  The whole gorging flock (which also included a few Ring-billed Gulls) moved quickly across the surface in a rolling wave.  I managed to get a couple of decent photographs, in the one below you can also make out a flight of new birds coming in to share the wealth.

On a different note and in appreciation of Victorian nonsense poets I’m including this oddball piece of cormorant verse.

The common cormorant or shag

Lays eggs in a paper bag.

The reason you will see, no doubt,

Is to keep the lightning out,

But what these observant birds

Have never noticed is herds

Of wandering bears may come with buns

And steal the bags to hold the crumbs.Double-crested Cormorants

Canada Warbler

 June 24 2012. Back to the Lake Erie shores today, to the same darkened forest preserve where we’ve been doing point counts.  I went with three goals: to be alone, to see if I could confirm a suspected Canada Warbler, and to study the many species of ferns that grow there.

Alone I move at my own pace and suffer or surrender to the mosquitoes as it suits me.  They were certainly active and unpleasant, especially when I crawled low for photographs  to capture the undersides of fern fronds.  I dislike insect repellants with the active ingredient DEET, but they work and I use them, though sparingly. Quite apart from DEET’s apparent toxicity I know that it will melt plastic; I’ve seen it happen, I spilled some in my car.

The putative Canada Warblerhas been singing from deep within a roadside tangle of cedar, grape and willow for a month or so.  On every visit I have tried without success to draw him out, today I was prepared to spend all morning at it if I had to.  Worse, the suspect was one of three or four more all singing the same song in the same general area, a tease that only heightened my desire to clinch it.  The Canada Warbler always starts his song with a single tiny ‘chip’ just ahead of a fast scramble of clear notes, I could hear a ‘chip’, a compelling clue, but not good enough for confirmation. A blow-by-blow description of my search would be tedious so it’s enough to report that he put up a good fight but in the end I found him, flitting low in the dark cedars. Here are two shots of a Canada Warbler, one to show what a handsome creature it is, the other exemplifies how elusive they can be.

Canada Warbler just banded and about to go free

Canada Warbler – a lucky shot

Now all that was left was to enjoy the ferns.  I know almost nothing about ferns except that I can identify a handful of the more unusual or conspicuous ones such as Christmas Fern, Maidenhair Fern and Royal Fern.  But the rest all seem to merge into a blur of mix and match adjectives like graceful, delicate, and arching.

As I spent several hours feeding mosquitoes, flipping through two reference books examining stalks, leafs and leaflets, I stayed in tune with the bird life above.  While most birds were not visible, I did manage to see an Eastern Towhee, a nervous Veery, and a pair of Northern Flickers high in a towering maple.  And songs and calls heard albeit without a supporting appearance, included: Acadian Flycatcher, Black-throated Green Warbler, Red-eyed Vireo, Carolina Wren and Winter Wren.

Later while trying to locate an unknown bird in a bright and overgrown clearing, a male Scarlet Tanagercame in to view and spent several minutes gathering food for his children.  In the riot of green around us he was red-hot and quite breathtaking. This photo was taken at a bird observatory is of a male and a female Scarlet Tanager, what a contrast!

Male and female Scarlet Tanagers

A mystery remains however.  In three quite separate locations, all deep in the deciduous forest I heard a repetitive song: “Chawee chawee chaweechoo”.  It had the distinct feel and resonance of a warbler, it came from a bird that moved from post to post and it didn’t respond to any of my attempts to call it in closer.  One day I’ll close the loop but it may not be this year, the woods will go quiet any day now.

Veery

June 23 2012. We went out early this morning to continue with one of my volunteer monitoring efforts, this time visiting a marsh.  It was a little disappointing; I had high expectations of this site because last year when the water level was high I’d had little difficulty finding Sora and Marsh Wrens.  Things change, this year the water is two or three feet lower, almost dried out in places and the formerly luxuriant expanse of cattail seems sparse.  We heard as many as four Sora this morning, saw families of Barn Swallows skimming for insects but there were no Marsh Wrens anywhere.

Our fieldwork done we left for a country walk along a dry trail past farmland, a pond or two and into a swampy wood.  It was in the woods that I heard the calls of several Veerys, not their winding, fluty exhalations but simple contact notes: “Swerp”, all around us.  Then, almost out of hearing range, one started to sing:  “Veer Veer veerr ver vr vr”  repeated two or three times.  Others picked up the theme and around us four or five, maybe more, all singing.  We watched one, a smallish thrush with a warm brown back and faded cream breast, come out in the open and briefly sing his part with nervous intensity.

The last time I wrote about the Veery’s song a reader commented that almost all descriptions of it include the word ethereal; and it’s true – few other adjectives fit. Not many people can listen to the Veery without stopping still in their tracks, try this recording on this Music of Nature website and see what you think.  The Veery chorus gave the morning its the wow moment, and earned them Bird of the Day.

I used to think warblers were not for mere mortals, that we’d get a glimpse or two during spring migration, lose them all summer and then be confounded by them in their different fall plumage.  Well I’ve become persuaded otherwise now that I have the time in my life to get out more, go further and look closer.  It’s still the case that many of these spectacular little birds vault right over us in May to breed much further north: Northern Parula, Blackpoll and Palm Warblers for example.  But even this morning’s gentle three-hour outing turned up six warbler species: Northern Waterthrushes singing alongside the Veerys, a trilling Pine Warbler in the tops of a plantation of Austrian Pines, a Common Yellowthroat at the edge of a pond, Yellow warblers popping in and out of low shrubs everywhere, a distant Ovenbird and a Bluewinged Warbler in the scrubby margins of a power line corridor.

We spent a while picking strawberries and then went looking for Butterfly Weed, a close relative of Milkweed, and found a nice patch of it among some scrubby hawthorns and dogwoods, it gave us this brilliant splash of colour to end our morning with.Butterfly Weed

Black-throated Green Warbler

June 20 2012.  We went back to the same old-growth forest this morning to continue with our study and point counts.  It was very warm at the start and the mosquitoes were happy to see us.  For a while I felt as though I was conducting a one-man study on mosquito attraction.  I know they’re are drawn to carbon dioxide, so for a while I tried not to exhale, but couldn’t keep it up.  Body heat, lactic acid and octenol are also appealing to them and to quote from an on-line source:  When people and animals breathe, they exhale a mixture of carbon dioxide and octenol, which is actually a type ofalcohol. Octenol is sometimes described as ‘cow’s breath in a can’, and is a remarkable lure for mosquitoes…. I’m not sure how I feel about that; but comforted that we’re all in it together.

Evidently different mosquito species find different cues more compelling and I was intrigued that a few seemed to believe that my auditory canal was the choicest place to find a meal. Perhaps for them it’s the most obvious point source of body heat; but whatever the reason it’s one thing to swat a mosquito on your jaw-line but banging away on your ear does little except aggravate tinnitus.

Mosquitoes aside, today’s Birds of the Day were Black-throated Green Warblers. Although I couldn’t see any of several territorial males in the forest canopy above, I solved a piece of the endless birding jigsaw puzzle by experiencing how the dense forest affects their song.  In spring migration we listen for the Black-throated Green’s deliberate and buzzy signature song: “Zee zee zee zee Zoo Zee”- with the emphasis on the last two notes.  Today I could quite distinctly make out this song in its entirety – but only when the bird was fairly close.  With distance the softer notes vanished until all I could pick out were the last two, which when isolated from the introduction notes, came out as “doo deet” repeated over and over. This was something of a breakthrough for me as I know I’ve heard that repetitive two-note song many times before, but could never figure out whose it was.  So a minor achievement today.  Here’s a shot of a Black-throated Green Warbler taken just six weeks ago.

Black -throated Green Warbler