Don't know of any published research Al, but I have noticed as I do my "routes" - for the MN Breeding Bird Atlas - that I'm getting better at ID'ing birds from partial songs, as several species like Red-wing Blackbirds, Indigo buntings, Robins, Cardinals, House Finches, and Yellow-throated Vireos are only singing partial songs in addition to singing less frequently.
As for the mute, I notice I no longer hear pheasants or cranes. Also, Sedge Wrens, Willow Flycatchers, Veeries, Brown Thrashers, and Warbling Vireos have been silent for a few weeks. Baltimore Orioles have been quiet for about a month. On the other hand, Song Sparrows, Swamp Sparrows, Marsh Wrens, House Wrens and Common Yellowthroats continue to sing pretty readily. I don't know if my experience is local, typical region-wide or unusual. On another front, I have noticed several species seem to be in post-breeding patterns already and are in their early staging phase done pre-migration. This seems earlier than last year despite the looong cold spring we had. -- Sincerely, Jim Ryan Saint Paul's Westside ---- Truth does not become more true by virtue of the fact that the entire world agrees with it, nor less so even if the whole world disagrees with it. - Maimonides (1135-1204) ---- On Sat, Jul 13, 2013 at 2:46 PM, Al Schirmacher <alschirmac...@live.com>wrote: > 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 > ---- Join or Leave mou-net: http://lists.umn.edu/cgi-bin/wa?SUBED1=mou-net Archives: http://lists.umn.edu/archives/mou-net.html
