共 50 条
- [41] Incidents of mixed clutches among scaup and Ring-billed Gulls WATERBIRDS, 2000, 23 (01): : 114 - 116
- [42] Nocturnal activity of Ring-billed Gulls at and away from the colony WATERBIRDS, 1999, 22 (03): : 445 - 451
- [43] SEX-RELATED DIFFERENCES IN TERRITORIAL AGGRESSION BY RING-BILLED GULLS AUK, 1981, 98 (01): : 179 - 181
- [47] FLORIDA DISTRIBUTION OF RING-BILLED GULLS FROM GREAT LAKES REGION BIRD-BANDING, 1974, 45 (04): : 341 - 352
- [49] REPRODUCTIVE-PERFORMANCE OF RING-BILLED GULLS IN RELATION TO NEST LOCATION CONDOR, 1981, 83 (01): : 57 - 60
- [50] HERRING AND RING-BILLED GULLS PAIRED OR COURTING IN MARYLAND IN JANUARY AND FEBRUARY AUK, 1971, 88 (02): : 438 - &