School of Life Sciences | Ask A Biologist

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Why is Rudolp's nose red?

Bird Details

Gull Like Gull Like

Caspian Tern

Sterna caspia

Caspian Tern
copyright Doug Backlund
Length: 21 in. (53 cm)
Always associated with water, this large tern can be seen on river beaches, over lakes and marshes, or along the ocean throughout the world. It feeds on fish and crustaceans captured by diving headfirst into the water. Breeding colonies are on beaches and grassy hummocks near the water, and the nest is on the sand with some moss or grass. Parents continue to feed the young after they leave the nest for up to 7 months. The four-digit banding code is CATE.

Open water
Open water

Marsh / swamp
Marsh / swamp

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Male
Croaking (sound type)
Bird Call
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CR_CATE_1_051405_S.jpg
Male
Croaking (sound type)
Bird Call

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Be part of Ask A Biologist

by volunteering, or simply sending us feedback on the site. Scientists, teachers, writers, illustrators, and translators are all important to the program. If you are interested in helping with the website we have a Volunteer page to get the process started.