Concerns
In the states of Alaska and Washington, and in parts of western Canada, Black-capped Chickadees are among a number of bird species affected by an unknown agent that is causing beak deformities which may cause stress for affected species by inhibiting feeding ability, mating, and grooming. Black-capped Chickadees were the first affected bird species, with reports of the deformity beginning in Alaska in the late 1990s, but more recently the deformity has been observed in close to 30 bird species in the affected areas.
Read more about this topic: Black-capped Chickadee
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