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Ring-bill
april 12, 1955.
IV

to spot where where ♀ has remained. MC ♂ HD-OT-U-HF-U. ♀ U-HF ♀ walks away a foot or two. Second ♀ lands with ♂. MC ♂ HD-OT-U-HF-U. ♀ U-HF-U-T-U. 1:40 Both relax.

HD-OT before attack - bird in M-O-HD-OT attacked. HD-OT before attack - bird in HD-OT-U attacked. HD-OT after attack HD-OT-U-T-U. HD-OT. U. U  U before escape  U. U. U. HD-OT. PAG HD-OT-M. U-HF. U before attack - U after attack 2:07 HD-OT Bird in HD-OT attacked. OT after attack U. U. HD-OT after attack O-LCN-O-O OT-T. OT. OT. OT. OT. OT. U.

M.C. ♀ does HD-OT before female lands. Then mutual U-HF-U.

U before attack - Bird in U attacked - U after attack - U after being attacked. M. M. HF. T U after escape U before escape U before escape. PG. U before attack - bird in U attacked - U after attack - U after being attacked - U after escape - U before escape. U. U. OT. U-PG before attack O. OT. HD-OT. U before attack - U after attack - bird in U attacked - U after being attacked OT. OT. OT. M. OT. HD-OT. OT. OT. OT. HD-OT. HD. OT. U. O-HD-OT. GP before attack -  U-T after attack - bird in U attacked - U-HF after being attacked. OT before attack HD-T. M. M.

♀ on mound Joined by a ♂. MC ♂ does O-HD-OT-U-HF-U. ♀ does U-HF-U. Then ♀ flies off. Land beside a second male far away. Mutual MC. U-HF-U 2:55

The Landing Call is noticeably hoarser, less "clear" than the Long Call. Landing Call after has an almost "choking" rhythm, or, at least, the later syllables do. Harsh.

Aerial LCN is intermediate in tone, "semi clear", between LC and Landing Call. M call is "muffled", like Landing Call, but