[Tweeters] Fwd: Eurasian collared doves

[Nelson Briefer]

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

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