During the final segment in the ascent of a high peak, before coming to the tree line, or on a trip through a lowland forest of spruce and fir, a very hoarse-sounding chickadee may be heard. While a novice birder or an inexperienced naturalist may assume that the individual responsible for this raspy chickadee song is the common black-capped variety with a bad head cold or a case of throat congestion, the more knowledgeable outdoorsman would recognize the voice as that of a cold-hardy resident of the far north–the boreal chickadee.
Aside from its similar call, the boreal chickadee is nearly the same size and has a color pattern that resembles its friendly, perky relative that is familiar to anyone with a feeder in his/her yard. When getting only a quick glimpse of one, seeing one in a dimly lit spot, or when its body is partially obscured by evergreen boughs, it is a challenge to distinguish between these two birds.
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