Photo 68158024, (c) Alexey P. Seregin, some rights reserved (CC BY-NC), uploaded by Alexey P. Seregin

Attribution © Alexey P. Seregin some rights reserved Uploaded by apseregin Source iNaturalist Associated observations Photos / Sounds 3 photos What Black-headed Gull (Chroicocephalus ridibundus) Observer apseregin Date April 9, 2020 04:19 PM MSK Place зазказник Поляница, Москва, Россия (Google, OSM) Date Added April 23, 2020 06:35 AM MSK Description Research project 19-34-70018 funded by RFBR and Moscow city Government 3 IDs Research Grade View Sizes small medium large original