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/CAGj6Roqc2AiikEv%2B5g5k0G7-PXeWBup0BhwO6JiQYOV_DQGFig%40mail.gmail.com.
