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Mixed Diglossini, May 11, 1965, IV (22) than overlapping Arrive area where Laf and Cy, and Aters and Cys, seen together yesterday 8:00 am. Nothing visible now, except a single small green hummingbird (not VIII, possibly [[underlined]] Eriocnemis [[/underlined]] species) feeding flowers Ater-Cy bush. ^[[Laf 155]] Then see single Laf ^[[checkmark]], alone, feeding dark red cup shaped flowers of bush 20 ft away. (Even though these flowers are not tubular, more or less comme ça [[image - drawing of flower]], the Lafs still cut into the base of the petals - or sepals). ^[[Ater Cy 157]] Then see juv. ^[[checkmark]] Ater feeding same bush as yesterday. Adult Cy j ---> Ater! Both feed. A few feet apart. Then fly in different directions. ^[[Ater 158 Laf]] 8:10. See adult Ater ^[[checkmark]] [[underlined]] Singing [[/underlined]], perched exposed bush about 30 ft away. 10 ft up. Short twitters. One might be transcribed as "Tuk-tuk-ta-zee-tuk-zee!! [[underlined]] NOD [[/underlined]]. Shuts up. Flies off. A minute later, I hear Laf Singing down hill. Then shuts up ^[[Ater]] 8:18 Juv. Ater back feeding same bush. It [[underlined]] also [[/underlined]] is cutting into bases flowers. Then suddenly supplanted and chased by adult Ater. Everything very quiet now. 8:30 am. Going further up hill. ^[[Cy 160 Laf CC]] Just as I start to go, hear Cy Songs. With Intro Notes. Then 2 ^[[2 checkmarks]] Cys (adult and presumed juv.) fly into bush where Laf seen feeding earlier. Feed on dark red cup-shaped flowers. These birds do [[underlined]] not [[/underlined]] cut into the bases of the flowers. Stick bills into cups, just like hummingbirds. The Laf does not show up while the Cys are feeding. They soon fly on. The territory of these 2 Cys (and I think they must be mated pair) [[underlined]] certainly [[/underlined]] overlaps, and probably overlaps completely, territories both Aters and Laf. And must overlap territory CC at least to some extent. No trace of vertical stratification of territories here. (The vegetation would not permit it. Tall trees are