Migration timing of Pallas’s Grasshopper-warbler Locustella certhiola and Lanceolated Warbler L. lanceolata at a stopover site in the Russian Far East

Abstract

The aim of our study was to describe the migration timing of two Siberian Locustella species at a breeding site in the Russian Far East. Our results show, that juvenile Lanceolated Warbler Locustella lanceolata leave the study site earlier than adults, while juvenile Pallas's Grasshopper Warbler L. certhiola start their migration later than adults, which might be caused by juveniles and adults moulting at different times. Both species undertake a fast migration without long-term stopovers at the study site.