Yes, the research on breeding time wrt climate change is a bit mixed. I
talked about this in my presentation to Black Hills Audubon a couple months
ago (video on their webpage) and in a recent article in *Birding *magazine
(the one with the tern on the cover). In general, long-distance migrants
seem to be wired more to day length than weather. But resident species
(e.g. chickadees, etc) are possibly more flexible. They need 6,000 moth
caterpillars to fledge a nest, and these are in general coming earlier
now. I'd be curious to compare breeding phenology (e.g. egg laying, chick
hatching, chick fledging dates) between resident species and long-distance
migrants. Of course, each species has a typical uniqueness!
On Mon, Feb 20, 2023 at 12:21 PM HAL MICHAEL <
ucd880 at comcast.net> wrote:
>
I look at my nest box data. It is, obviously, only for hole nesting birds
>
but over 30 years some trends should emerge.
>
>
Nesting phenology is something that will require long-term data sets. I
>
was looking at my boxes and there seems to be a trend to actually nesting
>
later. While I think this is because of (ultimately) food resources this
>
did not correlate with rainfall or temperature during the nesting period
>
(Spring). A number of species (certainly waterfowl) seem to nest in
>
response to food availability. That is, there is some trigger that tells
>
them good food will be available for the hatchlings.
>
>
I have read (somewhere) that warming spring temperatures have induced
>
plants to bud out and grow earlier. Probably increases bug emergence. But
>
migratory birds are tied more strongly to daylength and thereby arrive on
>
the grounds after bug emergence and consequently miss the bug bloom, so
>
less food is available.
>
>
Lots of variables to consider but you'll need really long (multi decadal)
>
data sets for it.
>
>
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 02/20/2023 11:33 AM Steve Hampton <stevechampton at gmail.com> wrote:
>
>
>
I'd love to know what you find about breeding timing data. This is of
>
great relevance to studying changes wrt climate change.
>
>
Regarding migration, eBird bar charts are pretty good. eBird maps allow
>
you to zero in only by month, but the bar charts are by week. Note the wave
>
of Barn Swallows at the moment!
>
>
>
>
On Mon, Feb 20, 2023 at 11:26 AM Tucker, Trileigh <TRI at seattleu.edu>
>
wrote:
>
>
Hi Tweets,
>
>
>
>
I'm wondering if somewhere out there is an all-in-one guide to W
>
Wash/Salish Sea area/Seattle bird phenology. I have Morse et al.'s *Birds
>
of the Puget Sound Region*, Hunn's *Birding in Seattle and King County*,
>
and Fisher's *Birds of Seattle*-;all excellent guides for their own
>
purposes, but none of which includes the kind of chronology I'm looking
>
for.
>
>
>
>
The Burke Museum has a nicely done summary of first-egg dates for local
>
species here
>
<https://www.burkemuseum.org/sites/default/files/2019-07/BreedingPhenologyProject_sm.pdf>,
>
and Seattle Audubon's BirdWeb <http://www.birdweb.org/birdweb/birds> has
>
tons of useful information, but it'd be great to have more detailed
>
phenology data. Of course I can look up phenology online on a
>
species-by-species basis, and there are some rich databases out there, but
>
I'd love to get a single guide that shows all local species' annual
>
patterns for nest-building, egg-laying, fledging, migration, etc. I'm
>
picturing something like a bar chart for each species with Jan-Dec along
>
the top line, and lower lines for each behavior, but I'll take whatever I
>
can get. 😊
>
>
>
>
Does such a thing exist?
>
>
>
>
Thanks much and good birding to all,
>
>
Trileigh
>
>
>
>
*Trileigh Tucker*
>
>
*Pelly Valley, West Seattle *
>
>
*NaturalPresenceArts.com <http://naturalpresencearts.com/>*
>
>
>
>
>
_______________________________________________
>
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>
Tweeters at u.washington.edu
>
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>
>
>
>
--
>
Steve Hampton
>
Port Townsend, WA (qatáy)
>
>
>
_______________________________________________
>
Tweeters mailing list
>
Tweeters at u.washington.edu
>
http://mailman11.u.washington.edu/mailman/listinfo/tweeters
>
>
--
Steve Hampton
Port Townsend, WA (qatáy)