Sorry meant to send this email to someone else! > On Jun 27, 2016, at 5:08 PM, Terry Hunter <[email protected]> wrote: > > You both may already know the info in the below Cobird (bird postings in CO) > emails. I did not know the #1 and #2 host species for Cowbirds were the > Yellow Warbler and Song Sparrow. Yipes! > > >> On Jun 27, 2016, at 12:20 PM, Jim Nelson <[email protected]> wrote: >> >> Brian, >> >> It is interesting to see how many different species raise Cowbird chicks. >> According to the species account in Birds of North America Online, one >> comprehensive source found that Yellow Warblers are the most frequent host >> species for Brown-headed Cowbirds. At home here in Maryland, I see Song >> Sparrows (which are the number two most frequent host species) feeding >> Cowbird chicks in our yard every summer. >> >> The largest size disparity I have ever witnessed was a tiny Ruby-crowned >> Kinglet feeding a significantly bigger Cowbird chick in Rocky Mountain >> National Park. >> >> Jim Nelson >> Bethesda, Maryland >> >> From: [email protected] >> Sent: Monday, June 27, 2016 1:49 PM >> To: Colorado Birds >> Subject: [cobirds] Yellow Warbler and Cowbird, Arapahoe County >> >> Today while walking along my favorite part of the Mary Carter Greenway I >> encounter an odd looking bird that I could not figure out. It was all brown >> with fine streaks along the breast and belly but the bill was wrong for a >> finch and it was too big. Then I noticed it was flapping around from branch >> to branch frantically, and I noticed it was chasing a yellow warbler male >> and constantly calling. I could not make sense of why this bird would be >> chasing a warbler and calling like that. Finley both stopped on a Russian >> olive branch and I was able to get a better view. I observed the warbler >> glean an insect (likely a gnat) and take it lower down to the unknown bird >> and stick it in the bird’s mouth. It finally came together then. This was a >> recently fledged juvenile brown headed cowbird that the warbler believed to >> be its offspring. It was certainly dwarfed by the cowbird. I have not seen >> this in the wild before, I have one nature programs but that was it. >> Interesting behavior to watch, not all that good for the warblers however. >> Hopefully their population will not be to affected by this along the river. >> This was at the mile marker 12, the dirt walking path goes through some >> woods that is a favorite for warblers and other birds. Thought I would share >> this. >> >> Brian Johnson >> >> Englewood CO >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Colorado Birds" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/cobirds/e6a087cd-2a5e-475a-ae68-035ce6e3d871%40googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> -- >> You received this message because you are subscribed to the Google Groups >> "Colorado Birds" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/cobirds/880480934A114201BE5F208CA72F45EC%40jimPC. >> For more options, visit https://groups.google.com/d/optout. > -- > You received this message because you are subscribed to the Google Groups > "Colorado Birds" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/cobirds/FD0BB150-DFE9-4321-897D-A4C0A1E6971D%40comcast.net. > For more options, visit https://groups.google.com/d/optout.
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