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Atlapetes, Jun. 1, 1960, II (34) Several times, both today and yesterday, we have observed more Yellow-bellies uttering "Dit", "Didit", and "Didididi...." notes quite like those described above on May 30, 1960, p. 31. Some birds near mates and others [[underlined]]apparently [[/underlined]] alone. None of these birds appeared to be alarmed by us at the time; so I am now almost certain these notes are "ordinary" CN's rather than AlCN's. [[underlined]] Atlapetes [[/underlined]], I June 2, 1960 Cerro Pichincha Working near Nono again today. This morning, from the time I arrived, at 6:00 a.m., until at least 7:00 a.m., there were Black-headed Atlapetes singing all over the place!! I first became aware of this when a single Black-head flew across the road right in front of me. It uttered a lot of single "Seeeee" and "Sreeeeee" Notes in flight; and then continued to give the same notes after it landed, out of sight, in the bushes. After it had landed, it also uttered a few doublet notes "See-[[underlined]]seeeeee[[/underlined]]" [[image 1]] intermingled with the single ones. Then it began to utter "Soo-eeeeeee" Notes instead of the previous "Seeeee" and "Sreeeeee" Notes. All these notes were relatively clear and whistle-like, and at least moderately loud. The bird continued to utter "Soo-eeeeeee" Notes for quite a long time. They appeared to be essentially single notes, repeated at fairly distinct and rather regular intervals. Comme ça: [[image 2]] I could never get a good view of this bird while it was uttering these notes; but it was obvious (from the sound of the notes — and from the
Transcription Notes:
Edited: added "above" before "on May 30"
[[image 1: sketch of song structure]]
[[image 2: sketch of song structure]]
"Foo-eeeeeee" looks like "Soo-eeeeeee" and other "f"s as "S"; "f"s in "flight" etc. look different