Black-tailed Gull (crassirostris) / ウミネコ / 괭이갈매기

(last update: December 2015)

Black-tailed Gull (crassirostris) F07 2st cycle (1CY), December 30 2010, Choshi, Japan. Picture: Akimichi Ariga.

Please visit Akimichi's blog.

This bird has a metal ring on the right leg and a yellow ring on the left leg, with code F07.
It's a hatch year 2010 bird. F07 was ringed as chick (about 40 days old) on July 16 2010 at Hachinohe, Aomori Prefecture Kaburajima. There are two records for F07: the picture below is taken on December 30 2010 at Choshi fishing port in Japan. And the next recovery is on February 21 2011 in Taiwan.

If you observe any Black-tailed Gull with yellow ring, please contact:

Hokkaido University doctoral graduate Hirata Kazuhiko
Yubinbango 041-8611 Hakodate port town 3-1-1
Hokkaido University Graduate School of Fisheries Sciences resource ecology area
Khirata < at > Fish.Hokudai.Ac.Jp

The following information is relevant:
　　1. code on the ring and the colour of the ring
　　2. observation date and time
　　3. observation location (latitude and longitude in seconds if possible)
　　4. observer name, contact information
　　5. photos