TY CONF TI THE LEVEL OF REPRODUCTION SYNCHRONIZATION IN EARLY AND LATE COLONIES GULL BIRDS (ON THE EXAMPLE OF THE WHITE-WINGED BLACK TERN) KW Eastern Siberia KW Selenga river delta KW White-winged Black Tern KW colonial nesting KW breeding synchronization index JO SCIENCE AND INNOVATION 2021: DEVELOPMENT. Vol.IDIRECTIONS AND PRIORITIES AU Mel’nikov, Y.I. PY 2024 PB AUS PUBLISHERS