A project of

Boreal Chickadee

The State of Boreal Chickadees

Regionally: Steadily increasing

Boreal Chickadee Study Area Abundance

The mean (thick, dark brown line) annual estimate of Boreal Chickadee abundance—calculated as the annual sum of estimated Boreal Chickadee within the local area (a 4-hectare circle) surrounding all 720 Mountain Birdwatch sampling stations north of 43.5 degrees latitude (the southern extend of breeding for Boreal Chickadee in the northeastern U.S). The lighter vertical bars represent the 95% Bayesian credible interval (a measure of the uncertainty around the abundance estimates).

In our region, sizable populations of Boreal Chickadees only occur in Maine, New Hampshire, and the Adirondacks of New York. Mountain Birdwatch data suggest that Boreal Chickadee populations in the northeastern United States have been gradually increasing since 2010 at a mean annual rate of 2.52% (95% Bayesian credible interval [BCI] = -1.26% to 6.82%). The North American Breeding Bird Survey results also support these trends over the last decade, specifically, but Boreal Chickadee numbers have overall declined by >50% since the 1970s in our Northern Atlantic Forest bird conservation region. 

Globally: Declining

Because they occupy remote areas without road access, and because they tend to be quiet and secretive during the breeding season, Boreal Chickadees are not well-monitored by the Breeding Bird Survey. Available data, though, suggest that populations of Boreal Chickadees have broadly declined, since the late 1960s, across most of the United States and Canada with the exception of Alaska and northwest Canada.

Boreal Chickadee habitat is at risk of disappearance due to climate change. Recent climate modeling by Audubon, predicts that >50% of the current range of Boreal Chickadees will be lost over the next 100 years as temperatures increase. By the end of this century, it is probable that Boreal Chickadees will no longer occur in the lower 48 states. 


State of the Mountain Birds