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Checklist S38910532

 
Location
Presque Isle Park, Marquette County, Michigan, US ( Map ) ( Hotspot )
Date and Effort
Wed Aug 30, 2017 2:05 PM
Protocol:
Stationary
Party Size:
2
Duration:
3 hour(s), 10 minute(s)
Observers:
Gary Palmer , Skye Haas List
Submitted from eBird Android, version 1.5.6
Species
8 species (+2 other taxa) total
3
5

Part of an amazing fallout of jaegers immediately following a wet cold front passing over Lake Superior. As the rain receded we arrived to the point and soon after had our first pair of jaegers go by. Followed by a single, then a flock of 4 then a flock of 3.

The birds identified as Parasitics we two birds in the flock of four, and the flock of three and were ID'd by the following characters: All were juveniles and had a general gull-like shape with small heads, pointed chests and long pointed wings. All 5 birds had bold white under primaries bases with smaller but still noticeable white patches on the base of the upper primaries. This helped rule out LTJAs. None of the birds showed strong white patches on rumps, either the rumps were dark or were pale based with messy barring on top (observed well on two birds). Underwing coverts were hard to get good looks at but at least two birds showed warm colored patterning. Post-wing body and tail length was not noticeably long and looked proportionally correct for PAJA as opposed to the attenuated trailing body and tail of a LTJA. On one of the birds messy barred rump birds, it looked like it had two tiny central retrices pointed out when the bird was chasing another jaeger and flared its tail. 4 of the 5 PAJAs had warm brown plumage with some rusty tones to them, with one being pretty dark colored (but still with a bit of white on the base of the upper primaries).

5
jaeger sp.

Part of an amazing fallout of jaegers immediately following a wet cold front passing over Lake Superior. As the rain receded we arrived to the point and soon after had our first pair of jaegers go by. Followed by a single, then a flock of 4 then a flock of 3.

The unID'd birds were clearly jaegers with dark plumage, growing paler on the belly, small heads, long pointed wings all showing white bases to the under primary feathers. Deep wingbeats, faster than gulls, spirited chases of each other, and dynamic shearwatering all marked them as jaegers. 3 were likely Parasitics that were either too far or just not enough time to carefully look at all jaegers in a flock (such a sad problem..), one was too far to even get a feel for a species identity, and one looked structurally very good for a Long-tailed Jaeger with a long narrow body that had quite a bit of body post-wing with a long attenuated tail. It had narrow wings and tern-like hands in shape and when flying in direct comparison to another jaeger that was likely a PAJA, was smaller and more delicately build. But without any plumage characters, the bird could not be identified.

5
18
26
164

Exact count of migrants throughout observation period. Many single birds, several flocks up to 8 individuals, all birds migrating generally west to east paralleling shoreline, some quite distant, others cutting overhead.

13
1
1
passerine sp.
 

Are you submitting a complete checklist of the birds you were able to identify?

Yes