And this afternoon I had two Wilson's in my back yard (Berkeley neighborhood Denver) - new yard birds for me!
Bill Killam On Friday, September 24, 2021 at 1:58:02 PM UTC-6 [email protected] wrote: > There is a suggestion here maybe to extrapolate a good migrant > concentration at one place to fit it to the whole landscape, or similar > areas. But I think there is seldom evenness to the distribution of such > migrant landbirds. As an isolated grove, maybe the trees of Crow Valley > were a draw to bring warblers to concentrate in that general area, even if > they were foraging in the thickets? > > I had just one Wilson's in my patch near home this morning at Ken Caryl. I > could extrapolate that to balance the Crow Valley bounty :-) > > David Suddjian > Ken Caryl Valley > Littleton, CO > > On Fri, Sep 24, 2021 at 1:22 PM Robert Righter <[email protected]> > wrote: > >> Hi all >> >> While birding for two hours this morning, I detected 30 migrating >> Wilson’s Warblers. The vast majority were seen in thickets, not so much in >> the trees. So did I see all the Wilson’s Warblers in the campground? Most >> likely not. Given the inventory of thickets in the region, could I >> reasonable assume I only saw about half of the actual number—most likely >> so. The Wilson Warbler’s breeding range stretches from the Pacific ocean >> to the Atlantic Ocean, although the warbler is more common in the west than >> in the east. Since I was only in the region for two hours, what could this >> information mean towards calculating the total population for this warbler. >> Since the campground is just a mere speck in the totality of the warbler’s >> migrating range and just a moment in time, would it be reasonable to assume >> the total population for the warbler to be in the millions, hundreds of >> millions or……? >> >> Given the above example, what would others estimate Wilson’s Warbler >> total population to be? >> >> Bob Righter >> Denver CO >> >> -- >> > -- >> You received this message because you are subscribed to the Google >> Groups "Colorado Birds" group. >> To post to this group, send email to [email protected] >> For more options, visit this group at >> http://groups.google.com/group/cobirds?hl=en?hl=en >> * All posts should be signed with the poster's full name and city. >> Include bird species and location in the subject line when appropriate >> * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ >> --- >> 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 view this discussion on the web visit >> https://groups.google.com/d/msgid/cobirds/0A01F6D7-4021-4669-901F-13443C2DAE6E%40earthlink.net >> >> <https://groups.google.com/d/msgid/cobirds/0A01F6D7-4021-4669-901F-13443C2DAE6E%40earthlink.net?utm_medium=email&utm_source=footer> >> . >> > -- -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/cobirds?hl=en?hl=en * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ --- 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 view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/4bb3f868-0ce1-42b6-94b0-0e8889783db6n%40googlegroups.com.
