State of the Birds

Bonaparte's Gull
Chroicocephalus philadelphia

The Bonaparte's Gull is a common coastal migrant and winter resident in varying numbers in Massachusetts. Interestingly, as water purity at several former concentration localities has improved, the numbers of Bonaparte's Gulls at these sites have declined.
Conservation Status
No data

Tracking This Bird In Massachusetts

Climate Vulnerability Score
No data
Mass Audubon Mean likelihood of occurrence (current)
Mass Audubon Mean likelihood of occurrence (2050)
Mass Audubon Absolute change in likelihood of occurrence
no data
U.S. Forest Service Climate Change Bird Atlas (Hadly Hi emissions scenario)a
No data available
National Audubon Societyb
No data available
a USFS model data for Massachusetts by 2100
b National Audubon Society's Climate Change Atlas was completed on a continental scale.
Breeding Bird Atlas
Atlas I Blocks
Atlas II Blocks
Percent of state occupied - Atlas I
0
Percent of state occupied - Atlas II
0
Percent change
0
Breeding Bird Survey
Annual trend 1966-2010
P-value
Number of routes
Recent trend 2000-2010
Christmas Bird Count
Trend (1963-2008)
1.6
Significantly different than zero
no
Trend (1963-1979)
24.1
Significantly different than zero
yes
Trend (1979-2008)
-2.4
Significantly different than zero
no

Habitat Usage

Breeding
Does not breed in Massachusetts
Wintering
Coastal