Eurasian collared doves- there is something added to the equation and
something omitted. What is added is the capture of Eurasian collared doves
by Sharp- shinned Hawks and what is omitted is the presence of Goshawks.
Sharp- shinned hawks will not take the doves. Cooper's Hawks, the female,
and NG especially the female will take the doves, but to what degree I
cannot say. It might be that just the presence of large accipiters will
cause the population of doves to depart the area. I have stated this many
times-; When thinking of accipiters, never omit the goshawk. Nelson Briefer
- Anacortes.
On Fri, Jan 28, 2022 at 11:26 AM HAL MICHAEL <
ucd880 at comcast.net> wrote:
>
An interesting aspect of at least some exotic bird introductions is a boom
>
and then bust. This happened in Hawaii where a couple of exotics became
>
very abundant and then disappeared.
>
>
>
Hal Michael
>
Board of Directors,Ecologists Without Borders (http://ecowb.org/)
>
Olympia WA
>
360-459-4005
>
360-791-7702 (C)
>
ucd880 at comcast.net
>
>
> On 01/28/2022 7:50 AM Dennis Paulson <dennispaulson at comcast.net> wrote:
>
>
>
>
>
> Judy, I have observed the same thing in western Washington. They have
>
completely disappeared from several places in Skagit County where we always
>
saw them, and I've been wondering about it for a few years. It would be
>
interesting to find out about this in other parts of the continent;
>
shouldn't be difficult from Christmas Bird Counts. It's hard to believe
>
that Cooper's Hawks are entirely responsible, although they do relish
>
pigeons and doves as high-quality food, as do Peregrine Falcons.
>
>
>
> Dennis Paulson
>
> Seattle
>
>
>
> > On Jan 28, 2022, at 7:12 AM, judyem at olypen.com wrote:
>
> >
>
> >
>
> >
>
> > -------- Original Message --------
>
> > Subject: Eurasian collared doves
>
> > Date: 2022-01-27 20:53
>
> > From: judyem at olypen.com
>
> > To: tweeters at uwashington.edu
>
> >
>
> > I'm curious whether anyone has information or at least hypotheses
>
about the boom then bust of ECD populations. When they first appeared, we
>
were all rushing about to see them, then numbers got so strong they became
>
ho-hum or even pests. I've gone from having a couple pairs showing up daily
>
at my feeding area and a number on my daily walks to not seeing or hearing
>
a single one for weeks in a row. We have resident Cooper's hawks that have
>
bred successfully for several years (which don't seem to recognize Douglas
>
squirrels as menu items). I don't know whether other areas are seeing
>
similar declines in ECD populations, so I'd be interested in hearing you
>
observations.
>
> >
>
> > Judy Mullally Port Angeles WA judyem at olypen dot com
>
> > _______________________________________________
>
> > Tweeters mailing list
>
> > Tweeters at u.washington.edu
>
> > http://mailman11.u.washington.edu/mailman/listinfo/tweeters
>
>
>
> _______________________________________________
>
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>
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>
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