Arctic Tern

Sterna paradisaea

ML59050451


©
David Essian
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eBird Checklist S37085683
Boynton Beach Inlet Park
Palm Beach, Florida, United States
Search this location, Illustrated Checklist
Latitude and Longitude 26.5447, -80.0426 Map

Age
Adult
Sex
Unknown
Behaviors
Breeding
Tags

Comments

I did not have a camera, so I urged a non-birder with a camera to send me some photos that he took. He only photographed one of the birds (the longer-tailed one).

Observation details

The bird photographed here was easier to id as an Arctic Tern than the other. The other bird had a shorter tail, and a slightly lighter belly. The birds were foraging together at the end of the pier when I arrived, but then the bird with the shorter tail seemed to chase the other bird off. The slight difference in appearance, and apparent aggression made me initially think that the shorter tailed bird could be a Common Tern. However, both had the appearance of having no neck, because the wings were further forward on the body than a Common Tern. Neither bird had the dark wedge on the upper wing from the outer primaries. Both birds had a uniform red bill. Both had a thin, distinct black line on the trailing edge of the under wing. Both had the same flight style. The shorter-tailed bird foraged around the end of the pier for the full two hours. The longer-tailed bird returned to the pier around 7, and both birds foraged together for the rest of the evening.

Technical Information

Model
NIKON D5500
f-stop
f/5.6
Focal length
140 mm
Shutter speed
1/500 sec
ISO
6400
Flash
Flash did not fire, auto
Original file size
899KB
Dimensions
1620 x 1080

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