| Nomenclature and Taxonomy Follow the
Forty-first Supplement to the AOU Checklist of North American Birds (AOU 1997) Legend Ab Abundant: Should
see on every trip in the proper habitat.
C Common: Should see on 3 out of 4 trips in the proper
habitat
FC Fairly Common: Should see on 2 out of 4 trips in the proper habitat
U Uncommon: Should see on 1 out of 4 trips in the proper
habitat
R Rare: Should see on 1 out of 10 trips or less in the
proper habitat
Ca Casual: Not expected annually and includes out-of-season occurrences
for the region
Ac Accidental: Generally refers to 3 records or fewer for the region
? Questionable: Status not entirely known
(ir) Very irregular. May not occur year after year
(L) Occurs locally within a limited geographical or altitudinal range
(H) Historical records only (prior to 1974)
(ab) Absent throughout some areas in the Trans-Pecos but
observed regularly in others
BB Big Bend country. The southern three quarters of Brewster
and Presidio counties
NO Northern Trans-Pecos (from the Davis Mountains north)
VA Val Verde County and the southeastern Trans-Pecos
DM Davis Mountains
GU Guadalupe Mountains
CH Chisos Mountains
MT Normally found in the major mountain ranges
RG The Rio Grande watershed
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