Today, FSB kicks off Braden’s accounts of his truly remarkable spring birding trip from Maine to Montana. This adventure would take him to an astonishing variety of habitats most of us never get to experience. Along the way, he would drive 5,000 miles, visit nine states and provinces, and record 264 bird species, seven of them lifers. He begins this series with a visit to Maine’s arguably wildest and most inaccessible county: Aroostook.
Twenty-four hours after walking across the stage of the Cross Insurance Center in Bangor and receiving my college diploma, I was alone in a tent in Northern Maine. I’d gone to school in the state for four years, but never experienced it in the summertime, those three months when Maine is at its best. Now, with an abundance of time, I could leisurely make my way back to Montana instead of the six-day dash I’d done across the country last August. Because of this distant deadline, I’d arranged to spend a week in Maine birding and exploring following my graduation, and there was no better place to start than with one of the two counties I’d never visited: Aroostook County.
Known simply as “The County” to locals, Aroostook is by far the largest and least populated part of Maine. The County contains a large portion of the state’s agriculture, mostly located on its eastern flank, whereas the rest is coniferous forest. Aroostook’s high latitude and cooler climate create a haven for many boreal species of birds that have receded from their more southerly haunts because of warming and excessive logging that promotes regrowth of a different, unsuitable habitat. This northern conifer forest is also a hotspot for the primary topic of my dad’s previous post: warblers.
Warblers, in fact, were a major factor in my decision about where to go to school. I wanted to go to college somewhere where I could see as many warblers as possible, and Maine fit that bill perfectly. With almost thirty species of breeding warblers (nearly triple what Montana, a state twice the size, has) there is no better place to be, and that is especially true of Aroostook County, where most of them could be found. Lying in bed the night of Monday, May 12th, I felt nervous. It was still fairly early as far as migration goes. What if the birds weren’t here yet?
On Tuesday, May 13th, my worries were settled when I woke up to the sound of a Nashville Warbler singing above my tent. I dressed as quickly as I could and set off down the logging road I’d driven in on, my ears receptive to any and all of the birds sounding off in the surrounding woods. Every level of the forest had songsters belting out their tunes: Ovenbirds from the ground, Black-and-white Warblers from spruce trunks, Magnolia Warblers from ten-year-old firs and Yellow-rumped Warblers from high in the canopy. Present in lower numbers were species like Blackburnian Warblers, Black-throated Blue Warblers, and American Redstarts, all likely early representatives of their species, most of which were still farther south, booking it north.
I was especially excited about the two Cape May Warblers. While I’d seen a fair number of Cape Mays before, I’d rarely seen them in their breeding colors and I’d never heard them sing before. This is because of their distributions. While I’d encountered many of the East Coast warblers on their breeding grounds during my time in Pennsylvania, I was hundreds of miles too far south for Cape Mays, which use contiguous spruce-fir forest and are mostly confined to Canada. These warblers (which are named after Cape May, New Jersey, where they neither breed nor spend the winter) are particularly dependent on an insect known as spruce budworm. Budworms are spruce parasites, and their populations are cyclical. During outbreak years the insect infects and ravages thousands of acres of spruce trees before the population crashes. Cape May Warblers, Bay-breasted Warblers, and Evening Grosbeaks, therefore, all have populations that rise and fall with the populations of this insect.
Besides agriculture, the main industry in Aroostook County is logging, and understandably, the logging industry is not the biggest fan of an insect that defoliates thousands of acres of their crop. Unfortunately, the industry’s historical response to spruce budworm outbreaks (which, remember, are ecologically “normal” and important for the birds dependent on them) has been to clear-cut hundreds of hectares of infected forest. Spruce-fir forest is a mature ecosystem that takes centuries to develop, however, and the forest that grows back after these clearcuts is not coniferous but deciduous. This is a major reason why many spruce budworm-specialists, like Cape May Warbler, and many other birds found in boreal forests, like Canada Jays and Black-backed Woodpeckers, have retreated from much of southern Maine in the last hundred or so years. Their habitat has simply disappeared.
I saw evidence of this as I birded The County. Sure, there was a lot of seemingly healthy spruce habitat. There were also massive empty lots, covered in nothing but slash and debris. The forests were filled with birds, while the lots had almost none. It almost seemed apocalyptic. At least the empty lots provided good views of Mt. Katahdin, Maine’s highest peak, rising in the distance.
Again, though, the forests DID have birds, and not just warblers. Many migrants had not yet arrived (namely the flycatchers, of which I saw very few), but I recorded dozens of Ruby- and Golden-crowned Kinglets, Blue-headed Vireos, and Winter Wrens. Ruffed Grouse drummed from wet thickets, Hermit Thrushes foraged in the road, and I even got to see an American Goshawk bomb overhead at a million miles per hour, chasing something or perhaps just trying to give me as least satisfying a look as possible. In the evening, a walk along a side road yielded incredible, up-close views of Canada Jays, or “Whiskeyjacks” as they are known colloquially. These subtle, white-and-gray corvids landed in the trees less than five feet from me, curiously searching for insects while paying me no mind.
After a night and a day spent in The County, I headed back south to investigate the other corners of Maine I had yet to explore. Stay tuned!
