Date: 2/4/18 12:39 pm
From: Tim Rodenkirk <timrodenkirk...>
Subject: [obol] Re: Anna's nesting
Our feeders in Coos Bay are hopping also, the back feeder had 10 adult
males at sunset last night, so I think there is some movement happening now
also.

Tim R
Coos Bay

On Sunday, February 4, 2018, DJ Lauten and KACastelein <
<deweysage...> wrote:

> We have had fledglings at our feeder for about 2 -3 week now - that would
> be Bandon Coos Cty. In fact the feeders are almost as busy with Anna's
> right now as they are in summer with Selasphorus. I believe that would
> mean they were nest building and incubating in December at a minimum.
>
> Cheers
> Dave Lauten
>
>
> On 2/4/2018 9:35 AM, Gregor Yanega wrote:
>
> Hi Nathaniel and Abby-
>
> I would like to add that the more information you can gather on early
> dates for nest building the better for Anna’s, particularly because they
> have only recently expanded their range into Washington and Oregon and
> because they do show some latitudinal variation in onset of breeding that
> tracks some combination of winter rain, day length, or flowering phenology
> (all linked, though seasonality and climate differs somewhat in PNW and
> central/southern Cal)- there are late November- early December start up
> dates for Anna’s nesting in Southern California, certainly December and
> Early Jan start dates in Bay Area and I’ve seen Anna’s in Oregon start in
> late January. Does anyone have other nesting records for first nest of the
> season for Anna’s in Oregon?
>
> Thanks
> Gregor Yanega
>
> On Sat, Feb 3, 2018 at 10:38 PM Nathaniel Wander <nw105...>
> wrote:
>
>> Hiyah Abby,
>>
>> Fun sightings at Oaks Bottom. But, I wouldn't necessarily consider
>> Anna's nesting in early February a sign of spring. They nest throughout
>> fall and winter too: I've seen one sitting on an egg in San Francisco on
>> New Year's Day.
>>
>> I think they may have once been endemic to southern California in the US
>> and Baja California Norte in Mexico. As they spread north with the
>> planting of exotic vegetation and the provisioning of feeders--and maybe a
>> little global warming--they seem to have retained a sub-tropical breeding
>> pattern. That is, they breed mostly through the rainy season and knock off
>> in summer when there is probably less nectar available in the wild. They
>> feed nestlings mostly insects, but probably always need at least some
>> high-sugar, high-fat resources to maintain their incredible energy outputs.
>>
>> Nathaniel Wander
>> Portland
>>
>
>

 
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