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delawarensis  Index, 1955
 
With P&R, May 12, II General discussion motivation, May 12, II.

"PCC". Description; May 5, VII; May 10, II, III, VII; May 12, V.  By [[[male symbol]] in L approaching [[female symbol]], Apr. 13, II. The most M-like "PCC"s preliminary to ch., May 12, II. Discussion of difference from Mew-Call; May 10, VII, May 11, I; May 12, I

Mew-Call. General description; May 5, III; May 11, I; May 12, V. Description of call itself; May 5, VII; May 11, I; May 12, I, II, V. M by flying bird coming into land in communal area, no apparent connection with sex; Apr. 12, I, II; M in "sexual" circumstances. Description; Apr. 12, II; Apr 18, I; Apr 23, II; May 16, I, II. Stretch M posture, May 16, II. M notes from semi-U-semi-O posture, May 18, III General discussion differences between M and "PCC", May 11, I.

General Discussion High Intensity Hostile Displays. May 12, I; May 18, II.

Pre-Choking Posture. Like short-necked agg. U, (perhaps a form of W?); May 10, I.

Choking. Description ch. postures; May 12, III, V; May 16, I. Sketches; May 12, III; May 18, II. Description call; May 10, V; May 11, I. During mutual display of mates; May 5, VI, VII; May 8, IV, VI. Produced by neighbors or intruders, redirected toward mate; May 5, V; May 8, I; May 10, I, II. Orientation of redirected ch.; May 16, II. General infectiousness of ch.; May 12, IV. Ch. like preliminary regurge movements; May 10, II. With actual regurge, May 12, IV. Ch. int. movs. like Gost, with slight R; May 10, II  Ch. with Squat; May 8, I; May 12, I. Upward Ch. toward pot. pred.; May 12, II. Ch. posture without call or movements, by retreating bird; May 10, V.
General discussion of motivation; May 12, I, II; May 18, II. 

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