Forster's Tern

Sterna forsteri

ML83874741



eBird Checklist S42344402
Northshore Park
Pinellas, Florida, United States
Search this location, Illustrated Checklist
Latitude and Longitude 27.7841, -82.6244 Map

Age
Unknown
Sex
Unknown
Behaviors
Breeding
Tags

Media notes

Observation details

This bird threw me for a minute. The almost complete black cap was unlike the other 53 Forster's it was standing with. But this bird showed no carpal bar, only a faint darkness at the shoulder (feather wear and molt). In Kaufman's Advanced Birding he writes "All Commons in winter (not just immatures) should show a dark carpal bar, which is lacking or faint on Forster's." I noticed, too, the bill color is orange-ish red, unlike Commons and is thicker-based than what you would expect in Common. The leg color is orange, unlike the breeding-plumaged red of Common; and the Sibley Guide shows dark legs on Common in winter adults, first-year birds, and immatures.. Finally, The bird was the same height as the other 53 Forster's it was standing with. Commons have shorter legs and are noticeably lower to the ground when you see them with Forster's.

Technical Information

Model
DMC-FZ200
f-stop
f/4.0
Focal length
108 mm
Shutter speed
1/640 sec
ISO
100
Flash
Flash did not fire, auto
Original file size
495KB
Dimensions
1792 x 1344

Related Media

Same Observation

View All

Same Checklist

View All

Same Species

View All