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68
Mixed Diglossini, Apr. 20, 1965, IV

[[margin]] Scan Humer [[/margin]]
er apparently wins. Scans flies off and Humer returns to Abu. 
[[margin]] Scan Humer [[/margin]]
Aha! Scans feeding about 4 ft off ground small Abu. Humer flies from tree 30 ft away, driving straight toward Scans. Obviously hostile. Utters R in flight. Then, when only an inch away from Scans, Humer suddenly swerves. Lands in bush 1 ft away. Scans continues feeding in exactly same place as before. Apparently undisturbed. Then flies off to another bush. Then Humer returns to original tree.
[[margin]] Scan Humer [[/margin]]
Two Scans feeding in large Abu. Humer flies in. Lands a couple of feet away from the Scans. The latter continue feeding. But then fly away about 30 secs later. Then Humer returns where it came from. 
[[margin]] Scan Humer [[/margin]]
Obviously, the Humer(s) would like to "dispose" of the Scans. I.E. drive them away from the areas where they themselves (the Humer(s)) feed. But they often are reluctant to actually attack the Scans. Thus, they frequently end up "escorting" Scans in somewhat same way they would mixed flocks. 
[[margin]] Scan Humer [[/margin]]
Humers presumably are "dominant" over Scans now. But rather cautiously so. Scans may retreat before Humers simply because it is not "worthwhile" disputing. There are lots of flowers around and they can always return another time. 
[[margin]] Humer Scan [[/margin]]
6:50. Humer feeds inside large Abu, while Scans feed on outer flowers same bush 10 ft away. No overt hostility between the two species. Then Scans dispute with one another; fly off.
[[margin]] Scan Humer [[/margin]]
This illustrates one ecological difference between Scans and Humer. Abu trees and bushes are quite dense. Humers feed on flowers well inside the bushes or trees quite frequently. Scans, on the other hand, apparently always feed on outer flowers. This obviously is correlated with different methods of feeding. Humers (like all Diglossas) are perched while