Viewing page 54 of 299

This transcription has been completed. Contact us with corrections.

11
Mixed Diglossini, Sept. 17, 1962, VI 

[[left margin]] Albi [[/left margin]]
one bird landed near the other. Usually, apparently uttered by the Buff-throat. But at least twice apparently by the adult ♂ Albi 

Rain starts 9:05 am.

[[left margin]] Albi  Glor [[/left margin]]
I start back for the station. Then hear a complicated vocal performance, by at least three birds without being able to see any of them. One of them apparently an Albi. Uttering R's. One of them apparently a Glor. Probably A. uttering songs. The third either another Glor or a warbler of some sort uttering warbling songs of diglossine type. The R's of the Albi usually uttered in more or less regular alternation with the Glor or Glor-type warbles 1 R - 1 or 2 Glor or Glor-type warble - 1 R - 1 or 2 Glor or Glor-type warbles - 1 R ...... etc etc. All quite similar to inter-specific reactions near Quito. Only occasionally was there some slight overlap between R's and Glor or Glor-type warbles. The two birds uttering Glor or Glor-type warbles were far apart from one another (one about 75 ft above the Albi, the other about 20 ft below the Albi). Their songs did overlap frequently and to very large extents. Sometimes almost synchronous.

[[left margin]] Albi  Glor [[/left margin]]
If this alternation of vocal patterns is typical, it is perhaps surprising (in view of the fact that the R, the "song" of Albi is so specialized and so unlike the songs of other Diglossini). Albi must have retained its original reaction to the songs of other species even after its own song changed.
 
[[left margin]] Albi [[/left margin]]
Start out again 12:30 pm., after rain more or less stops. Arrive A Glor area to hear at least 2 Albis "singing", uttering R's. See on sitting high in tree, at least 50 ft off ground, while uttering R's. In same posture as bird seen earlier this morning. Then there is a brief burst

Transcription Notes:
First line - moved "ever" to preceding page to make complete word ("whenever") Last word - moved "t" from next page to make complete word ("burst")