Has anyone done significant song decline research across different species as summer progresses?
Most birders notice less song as summer progresses, but it would be interesting to know which species grow quiet, which become infrequent, and which continue, graphed against time. My thanks. Al Schirmacher Muscotah, KS Sent from my iPhone ---- Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net Archives: http://lists.umn.edu/archives/mou-net.html
