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FRANKLIN'S GULL. (1954). I AERIAL BEHAVIOR. 1. General. May 8, II; May 9, III. 2. Alarm. Note: May 8, II. Posture: May 8, II. 3. Landing Call. May 18, III, IV, V. 4. Long Call Note. Note: Note: May 8, II, III; June 9, I, II. Posture: May 8, II. 5. Glide. Call: May 12, I; May 15, II; May 18, IV, V; May 19, II; May 29, III. Posture: May 11, II; May 12, I; May 19, II; May 31, IV. 6. Plaintive Charge Call in ordinary flight. May 19, I; May 29, IV. 7. Charge, Swoop, and Soar. May 18, I, II, III; May 19 I; May 20, VI; May 24, II; May 25, I; May 29, IV, V; May 30, I, II, III; May 31, IV; June 4, I; June 9, II; June 13, IV. 8. Pursuits. (See also Charge, Swoop, and Soar). May 15, II; May 18, III, IV; May 19, I; May 20, I, VI. 9. Gakkering. June 7, III. 10. Swoop, Rise, and Hover. May 20, II; May 24, IV; May 25, II, IV; May 31, IV. Alternative Plaintive and Gakkering: June 1, I, II, III, IV; June 9, II. With variant of Plaintive: June 9, I. 11. Series of increasingly aggressive calls. June 9, II. 12. Fighting. Postures: May 24, IV.