The appearance of Lapland Buntings Calcarius lapponicus in song flight

Ingvar Byrkjedal, Terje Lislevand, Vegard Finset Fjeldheim
2016 Ornis Norvegica  
doi:10.15845/on.v39i0.1041 fatcat:sw3fq4clm5bsxggwpfvuv5s53q