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I look at my nest box data. It is, obviously, only for hole nesting birds but over 30 years some trends should emerge.
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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.
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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.
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Lots of variables to consider but you'll need really long (multi decadal) data sets for it.
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<span class="signature-truncate"><span class="signature-truncate">Hal Michael<br><span style="font-size: 12pt;">Board of Directors, </span><a style="font-size: 12pt;" href="http://ecowb.org/">Ecologists Without Borders</a></span></span>
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<span class="signature-truncate">Olympia WA<br>360-459-4005<br>360-791-7702 (C)<br>ucd880@comcast.net</span>
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On 02/20/2023 11:33 AM Steve Hampton <stevechampton@gmail.com> wrote:
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I'd love to know what you find about breeding timing data. This is of great relevance to studying changes wrt climate change.
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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!
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On Mon, Feb 20, 2023 at 11:26 AM Tucker, Trileigh <<a href="mailto:TRI@seattleu.edu">TRI@seattleu.edu</a>> wrote:
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<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;">Hi Tweets,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;">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 <em>Birds of the Puget Sound Region</em>, Hunn’s <em>Birding in Seattle and King County</em>, and Fisher’s <em>Birds of Seattle</em>—all excellent guides for their own purposes, but none of which includes the kind of chronology I’m looking for. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;">The Burke Museum has a nicely done summary of first-egg dates for local species <a target="_blank" href="https://www.burkemuseum.org/sites/default/files/2019-07/BreedingPhenologyProject_sm.pdf" rel="noopener"> here</a>, and Seattle Audubon’s <a target="_blank" href="http://www.birdweb.org/birdweb/birds" rel="noopener">BirdWeb</a> 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. </span> <span style="font-size: 12pt; font-family: 'Apple Color Emoji'; color: #1f3864;">😊</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;">Does such a thing exist?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;">Thanks much and good birding to all,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;">Trileigh<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;"><u></u> <u></u></span></p>
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<p class="MsoNormal"><em><span style="font-family: 'Lucida Bright',serif; color: #1f4e79;">Trileigh Tucker<u></u><u></u></span></em></p>
<p class="MsoNormal"><em><span style="font-family: 'Lucida Bright',serif; color: #1f4e79;">Pelly Valley, West Seattle <u></u><u></u></span></em></p>
<p class="MsoNormal"><em><span style="font-family: 'Lucida Bright',serif; color: #1f4e79;"><a target="_blank" href="http://naturalpresencearts.com/" rel="noopener"><span style="color: #033160;">NaturalPresenceArts.com</span></a><u></u><u></u></span></em></p>
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<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Lucida Bright',serif; color: #1f3864;"><u></u> <u></u></span></p>
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<span style="color: #073763; font-size: large;">Steve Hampton</span>
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Port Townsend, WA (<span style="color: #000000; font-family: verdana,arial,sans-serif; font-size: 13px;">qatáy</span>)
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