[mou] Evening Grosbeak trends

Robert_Russell@fws.gov Robert_Russell@fws.gov
Fri, 4 Feb 2005 11:20:16 -0600 

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Cornell University has an interesting page on Evening Grosbeak numbers =
with
several possible theories for their decline.  A range retraction after
several decades of range expansion seems plausible.  One theory
occasionally mentioned (but not in the Cornell piece) is that the great=

number of bird feeders in the North Country now short-stop the species
which thus doesn't have to travel farther south for food.  The problem =
with
that theory is that numbers now seem to be declining all over the North=

Country in the Great Lakes region and eastward.  Bob Russell

http://www.birdsource.org/Features/Evegro/index.html=

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<p>Cornell University has an interesting page on Evening Grosbeak numbe=
rs with several possible theories for their decline.  A range retractio=
n after several decades of range expansion seems plausible.  One theory=
 occasionally mentioned (but not in the Cornell piece) is that the grea=
t number of bird feeders in the North Country now short-stop the specie=
s which thus doesn't have to travel farther south for food.  The proble=
m with that theory is that numbers now seem to be declining all over th=
e North Country in the Great Lakes region and eastward.  Bob Russell<br=
>
<br>
<a href=3D"http://www.birdsource.org/Features/Evegro/index.html">http:/=
/www.birdsource.org/Features/Evegro/index.html</a></body></html>=

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