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Tangara, March 26, 1961, IV

no display by either bird before or during the feeding or transfer of n m.; but the male flew away from the female with typical CN Trills.

The male is marked with an aluminum band, while the female is unbanded, so that the 2 birds can be told apart without difficulty.

I watched the A birds building again this evening. I have now seen their building long enough to be able to say that the male never, or almost never does any actual building himself.  All I have ever seen him do is give n m. to the female, and even this is relatively rare.

The head shape of this species, at least when the birds are relaxed, is comme ça:

[[image - sketch of bird]
this nape curve sometimes longer and more rounded.

Tangara, I

March 27, 1961
Barro, Colorado

I have now decided that pair A is not the pair which had the nest right beside my house a few days ago.  The A birds were followed by two other, presumably young, Plain-coloreds this morning.  This morning there was also another pair, in an area nearer my house, which was attended by a single other bird. I think this latter pair must be the one which had the nest by my house.

If so, this means that I have heard "Sreee" notes uttered by birds of two different pairs.

The A birds behaved in much the same way today as they did yesterday and the day before.  But perhaps they built a little less frequently 

Transcription Notes:
n.m: Nesting materials?