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Ring-bill April 13, 1955 II Leaving 12:30 Back 1:23 Even fewer gulls Back 3:40. Gulls starting to return. U1 -HD1 -OT1 Peculiar "Landing Call" of this species given with closed or almost closed bill. Leaving 4:10. Gulls asleep. April 17, 1955 12:25 p.m. Portage Creek Cold Cloudy windy. M.C. ♀ gives Landing Call as she lands, no ♂ call. Then ♂ does U-HF-U-attacks ♀ U-attacks ♀ -U. ♀ does U-HF-U-retreat-U-retreat-flies off-lands beside another ♂ U before attack - U after attack o. u. u. u. before escape. u. u. u before attack - and in P attached HDTT. HDTT. TT. U. U. U. U before escape [HDT. U. U.] U after attack ♂, food in mouth, approaches ♀ with L posture, calls intermediate between M and LC. Leaving 12:45.