RING-BILLED GULL. 
(1954). Jit 
21. Regurgitation and Feeding. May 7, I; June 17, II. 
% * 
22. Copulation . General: June 16, V. Unsuccessful attempt: May 7, I. 
Call: April 26, IV; June 17, VI, 
23. Post-oopulatory patterns . Upright and He ad- flagging: April 26, IV 
< 
24. Feeding of chioks. With Moan: June 19, VIII. Without Moan: 
June Iy, II, ill, IV; June 19, I. Feeding strange chick: June 19, 
IV. 
Hostilit 
June TS7 
toward chick . 
June 19 
III, VI, VII. Redirected: 
26. 
Crouch . June 19, III. 
