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delawarensis   Index, non-aerial behavior in the wild, 1955 

Physical Description of the Bird:  Bill color, May 16, I.  Lines on face, May 16, II  Sketch, raised wing pattern, May 5, VI.

Territorialism   Before reaching the breeding grounds, Apr. 30, I. ♀'s as aggressive as ♂'s in territorial defense, May 10, III.

Violent Fighting   Without Choking, or Squat, or Freeze, May 10, V.

Wing-Raising or Spreading in Hostile Display:   In almost all these displays; May 12, IV; May 18, II.  One-sided wing spreading, May 18, III.

Tail-Raising in Hostile Display.  In almost all these displays, May 18, II.

Al.C.  From perfectly relaxed posture, May 8, IV.

Attack Call  Presumably like that of the B.h.G., May 12, V.

V. Uprights do not occur during high-intensity disputes, May 8, II.  Uprights not very infectious, May 12, 
V.  Aux. V, description, May 5, II.  Aux. V. with "crest", sketch, May 5, I.  Aux. V with half-shut eyes, May 5, V.  Intermediate V with half-shut eye, May 8, I.  Agg V. with half-shut eye, May 13, II.

Eye-Closing Description; May 12, V; May 13, II; May 16, I, II  General comment; May 8, III; May 12, V; May 16, I, II.

Ruffle  General comment, common with U, GP, & ch; May 10, VII, VIII; May 11, I.  Before attack, May 10, V.  With half-raised wings, before flying, Apr. 12, II.  Slight R with V and crest-raising, May 5, II.  With OG, May 5, IV  With W and Ch int. movs., sketch, May 10, IV.  With P and aux. LCN, May 12, II.  With Fr., just before Ch., May 12, IV.  General discussion motivation, May 18, II.

Preening Apparently relaxed, after MC's, Apr. 12, III.  Rapid and erratic, after obviously hostile disputes, May 12, IV.

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