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[[underlined]] Diglossa, [[/underlined]] May 26, 1960, II.

[[blue marking]]
to sing loudly when we moved about conspicuously near them.  The songs, in other words, may be used as a potential predator reaction.
[[/blue marking]]

[[pink and blue marking]]
In case I have not made it completely clear in the preceding pages, I must stress that the [[male symbol]]'s and [[female symbol]]'s of both the small black and the blue-spotted species seem to keep almost completely apart.  They must come together for copulations;  but we have very seldom seen a [[male symbol]] and [[female symbol]] together except when both were feeding on the same flowers.  Such "feeding associations" seem to be essentially casual.  The rarity or absence of close "pair" associations between [[male symbol]] and [[female symbol]] Diglossas is another feature in which they resemble hummingbirds.
[[/pink and blue marking]]

[[green marking]]
We may have caught a brief glimpse, this morning, of a large bright blue Diglossa-type bird (which I definitely saw last year – without being able to study its behavior.  I think that we may have heard it sing this morning – although I couldn't actually see the bird when the singing occurred.  (I shall mark this species [[green marking]].  It might be [[underlined]] indigotica [[/underlined]] (see notes of July 29, 1960.)

The song we heard was as follows:  "Da Zee Zee Zee Zee"  More reminiscent of [[underlined]] baritula [[/underlined]] than of either the small black or the blue-spotted species.
[[/green marking]]

[[pink, blue and black marking]]
After hearing the song of one of the local species of Cone-bills (see today's notes on [[underlined]] Conirostrum, [[/underlined]] I am more than ever convinced that Diglossa is most closely related to the Bananaquit-Conebill group of warblers.
[[/pink, blue and black marking]]

Cerro Pichincha

This afternoon we made some more observations of the small black species, in the usual place.