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State of the Birds
Hermit Thrush
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Tracking This Bird In Massachusetts
Climate Vulnerability Score
Highly Vulnerable
Mass Audubon Mean likelihood of occurrence (current)
0.53
Mass Audubon Mean likelihood of occurrence (2050)
0.07
Mass Audubon Absolute change in likelihood of occurrence
-0.46
U.S. Forest Service Climate Change Bird Atlas (Hadly Hi emissions scenario)a
-13.40
National Audubon Societyb
Climate Threatened
a USFS model data for Massachusetts by 2100
b National Audubon Society's Climate Change Atlas was completed on a continental scale.
Mass Audubon, USFS, and National Audubon all indicate declines associated with climate change.
Breeding Bird Atlas

Atlas I Blocks
338
Atlas II Blocks
620
Percent of state occupied - Atlas I
35
Percent of state occupied - Atlas II
60
Percent change
159
Breeding Bird Survey

Annual trend 1966-2010
-0.2%
P-value
not significant
Number of routes
24
Recent trend 2000-2010
0.6%
Christmas Bird Count

Trend (1963-2008)
5.7
Significantly different than zero
yes
Trend (1963-1979)
0.2
Significantly different than zero
no
Trend (1979-2008)
8.7
Significantly different than zero
yes
Christmas Bird Count Sightings By Year

Data reflects sightings per person per hour in order to account for varying numbers of yearly volunteers.
Habitat Usage
Breeding
Forest
Wintering
Urban and Suburban