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

(last update: December 2015)

Kim Seog-min (South Korea)
Hideo Shimura (Japan)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

Black-tailed Gull (crassirostris) B75 14CY, February 23 2013, Choshi, Japan. Picture: Akimichi Ariga.

Please visit Akimichi's blog.

Left leg: plastic yellow ring white code B75. No metal ring. On the right leg it has a geo-locator (for positioning the bird with GPS, in Japan called Jioroketa).
Yellow B75 was ringed in 2009, in Kaburajima Hachinohe, Aomori Prefecture. When the ringing team trapped this bird, it had a metal ring, which proved it had been ringed as juvenile from hatch year 2000.

Yellow B75 has a contamination with oil from the head over the abdomen.

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