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29 August 2023
Olive-sided flycatchers (Contopus cooperi) tend to be uncommon wild birds in Pittsburgh. Not just have actually they declined 78per cent since 1970, however they are just current on migration and only one or two per period. Whenever three people had been on the exact same time, Friday 25 August, in Allegheny County it had been uncommon undoubtedly. These three weren’t the exact same bird:
- Sewickley Heights Borough Park at 8:20am, seen recently on Monday 28 Aug
- Hartwood Acres, Saxonburg areas at 10:50am
- Homewood Cemetery at noon
Though olive-sided flycatchers nest from Alaska to Newfoundland and southward in to the Cascades and Rockies, very little is famous of the migration channels. In autumn the east wild birds usually stream westward within Canada, after that hang a left at Minnesota and move through Great Plains and east Rockies. You can observe their particular general variety from third few days of August through third few days of October within slip program.
Olive-sided flycatcher regular general variety from eBird reputation and styles
Alaska’s reproduction olive-sided flycatchers tend to be decreasing quickly and possess one of many longest migrations of every flycatcher — from Alaska to Peru. Migratory stopover internet sites are particularly very important to their particular success but no person understood in which they moved therefore a research group, headed by Julie C. Hagelin, made a decision to keep track of the wild birds’ migration by getting all of them in mist nets and connecting geolocator backpacks.
whatever they found as soon as the wild birds came back usually Alaskan breeders lover out throughout the Rockies on the means south, some as asia as Tx, before they go through Mexico to south usa. In addition they discovered 13 crucial stopover internet sites which are vital on wild birds’ success on migration. A common places tend to be a little various in Central The united states in autumn versus springtime. Two of this 13 internet sites have been in the U.S. Cascade Mountains. All of the internet sites take these maps.
and non-breeding regions of a boreal songbird in
steep drop)
Pittsburgh never ever figures greatly into the olive-sided flycatcher’s travel schedule though this season we appeared to be a stylish stopover. Our wild birds most likely result from reproduction internet sites in east Canada.
Are our olive-sided flycatchers preventing during the exact same locations in Central The united states since the Alaskan team? We won’t understand until some operates an identical research in east Canada.
(photo from Wikimedia Commons, variety maps from eBird, stopover maps from DeGruyter; source backlinks have been in the captions)
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