Mackean 1964 Stercorarius pomarinus our. 2 juveniles were living in tall grass along nearly dry pond-covered with dense gray down. About size of Calif. Quail - but hard to gay due to heavy down. 24 July Nest #3 - only one bird in area, giving alarm calls, but not intensely. (Both birds were seen 21 July harassing Peregrine Falcon). No sign of other adult or juveniles. Nest #4 - both birds actively calling and defending. Empty egg shells near nest - but no sign of juveniles. Nest defense much more intense than pair #1, with large juveniles. Probably younger juveniles. 31 July Saw 1 juvenile with pair #4. larger than juveniles of Pair #1. Pair #2 - killed by oskinoes left on tundra. No sign of juveniles. 1 not too bad - taken. (# 315) ♀. Other - eggs taken.