C. humilei
95
Río Guamol, 14 mi. E Naltepex, Oaxaca
May 3 more than 2ft. or so above the ground. Very few other birds in the area - few Turdus grapi, many Poleiolola
(black capped type), Seturn gularis & peustelatus,
social flycatcher, Kipkadee - both common.
T. pleurostictus, linea long, yellow warbler, small
flycatcher - Empidonax, longer Myiornthus flycatcher-
a small species - but larger than nuttings -, Caloitta,
Now or less riparian - Cassiculus melanocerus (common),
Mormotus mexicanus, Onthali vetula, grackle. Others
are Amazoma allifom, Chrotophaga (common in worn
habitat), pygmy owl, hooded hawk, Chlordeiles,
audifannis, Nychedromus (in worn habitat).
I believe the ? worn gives the trill much more often
than the o?. Probably ? trills while o sings when they
duet. Only heard single birds singing today -
"the weet" or "wee sheet" exclusively - probably
the o?. Have not heard two birds sing this to-
gether but have heard one sing while other trills.
When bird flies at speeds tail before landing
and it is conspicuous - pairs seen to stay close
when moving and sometimes posture with
tail spread - usually duet in this position.
Singing continues most of day but drops off around
noon. Will answer imitations.
Seems to be "normal" set-up with pairs evenly
spaced in the habitat & working on single nests -
a very different situation compared to hoomlies
Chiapensis.