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59

Tangara, Mar. 29, 1961, II.

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that I thought such movements were not perfectly autochthonous
(They do perform such movements during perfectly normal comfort activities.)

About 7:15, the A birds return to the nest tree, with the other members of the flock, after being absent for some time. This time the A female is carrying n.m. And this time, the A male tries to drive off the other members of the flock. In other words, nest-building and intra-specific gregariousness are incompatible!!!

After this one incident, the A's stop building and the flock comes together again and stays together. 

Tangara, I
March 31, 1961
Barro Colorado

Surprisingly enough, the female of pair A spent quite a lot of time sitting quietly on the nest (which is now completed) this morning. Do you suppose she laid an egg yesterday?

The male did not usually stay near by while she sat. When she was off the nest, however, she usually stayed near the male, or he usually stayed near her. They usually flew together. They were seldom or never accompanied by other Plain-coloreds. I wonder how they managed to shake the other members of the flock?

Tangara, I
June 12, 1961
Frijoles

Rather late this morning (ca. 10:15 am) I saw a pair of Plain colored Tanagers engaged in n.b. Building high in a tree. Their behavior 

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Transcription Notes:
The keyboard shortcut for male is ALT+11 and for female is ALT+12 n.m. is nest material n.b. is nest building Thanks, I couldn't figure out what the intials meant.