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105
Cyanerpes, May 14, 1963, V.

of the transformation of a hostile signal into a contact note.

The other type of "CN" is softer, a rather muffled "chuk". Probably the "real" CN (I shall continue to call it this). Probably homologous with the CN's of other species. Probably contains little or no hostility.

CN's & SHN's intergrade. Difficult to tell how frequently, as even the extremities are not very different in sound.

Everything very quiet now 7:53. ♂ sitting alonge, in rather hunched but apparently unritualized posture. Uttering occasional PN's

I presume that these PN's are homologous with the "HCN"s of the Red-legs?

♂ suddenly lands near ♀. Goes into extreme St with R, followed by rapid series of PN's, still in extreme St. ♀ does retreat. (Is this why ♂ switches to PN's???) Then ♂ flies away. Lands a couple of feet away. Does R in St again, facing toward ♀. Then stops, BW's repeatedly, then flies away. 8:04 a m.

Both birds sitting quietly. Both preening. Far apart. Then ♂ flies to ♀, lands about 6 inches from her. Utters Bzz's in extreme St. Usual form St. FSt, some BL, no BF. Wings out slightly. Apparently no Q. TV. ♀ just sits. ♂ hops toward her. She flies off. He remains in St, but stops Buzzes. Then relaxes 8:09.

♂ suddenly starts to chase the ♀ violently and repeatedly with lots &  lots of Buzzes. This starts at the exact instant that a chachalaca lands on the cage. Redirection?

This, I think, is the only pair of Yellow-legs I have ever watched in which the ♂ was dominant over the ♀.

Leaving 8:15 am