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

(last update: December 2015)

Black-tailed Gull (crassirostris) D7 adult, February 21 2014, Choshi, Japan. Picture: Akimichi Ariga.

Please visit Akimichi's blog.

Left leg: plastic red ring white code D7. No metal ring. Red D7 was ringed on July 27 2012, ringed as adult in Bentenjima Aomori Prefecture Shimokita-gun Oma-cho.

Information on this project:
The plastic red rings have a vertical white code letter-digit [A8]. There is no metal ring of the Ministry of the Environment. Summer 2013 (up to July 30 2012) a total of 136 individuals were trapped and processed: 76 adults and 60 juveniles. Codes used are:
Adults: A1-9, B1-9, C1-9, D1-9, E1-9, F1-9, G1-5, G7, G9, H1-8, I1-6, I9.
Juvenile: G6, G8, H9, I7-8, J1-9, K1-9, L1-9, M1, N1-9, O1-9, P1-9.

Several birds were also attached with geo-locators for positioning and migration data. Geo-locators were attached for 10 birds: A1, A3, A5, A7, B8, C1, C5, C6, D6, G7

If you observe any Black-tailed Gull with red 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