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Parasitic Jaeger

Stercorarius parasiticus

ML113509171


©
Joseph Miller
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eBird Checklist S48280508
Cheyenne Bottoms WA
Barton, Kansas, United States
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Latitude and Longitude 38.4634, -98.6551 Map

Age
Unknown
Sex
Unknown
Behaviors
Breeding
Tags

Comments

Observation details

Dark morph juvenile first found earlier this morning by Aaron Batterbee. Medium sized all-dark jaeger with light cinnamon barring on underparts and neck. Seen fairly well although briefly at very close range while it was harassing gulls. Long-tailed Jaeger eliminated by the 5+ white primary shafts on the wing upperside, as opposed to only two in Long-tailed (fide Kaufman, 1990), as well as a bulkier appearance than expected for that species. Pomarine was more difficult to eliminate definitively, but the thin bill with little hint of a gonydeal angle, fairly small head, slightly paler nape, as well as the smaller size and seeming more slender and agile than expected for Pomarine and certainly from what I remember from a previous sighting of that species. Unfortunately was not able get a great look at the central tail feathers, so was unable to use that as an identification aid. Photos by Andrew Miller

Technical Information

Model
FinePix HS50EXR
f-stop
f/5.6
Focal length
185 mm
Shutter speed
1/950 sec
ISO
100
Flash
Flash did not fire, auto
Original file size
718KB
Dimensions
2304 x 1728

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