--0__=09BBE50DDFCD37818f9e8a93df938690918c09BBE50DDFCD3781 Content-transfer-encoding: quoted-printable Content-type: text/plain; charset=US-ASCII
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= --0__=09BBE50DDFCD37818f9e8a93df938690918c09BBE50DDFCD3781 Content-transfer-encoding: quoted-printable Content-type: text/html; charset=US-ASCII Content-Disposition: inline <html><body> <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>= --0__=09BBE50DDFCD37818f9e8a93df938690918c09BBE50DDFCD3781--
