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We have 12 other definitions for COPO
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Common Nighthawk nestlings overcame asymmetrical masses associated with asynchronous hatching within several days of hatching unlike Common Poorwill nestlings, which are reported to take up to 14 days to reach equivalent masses (Csada and Brigham 1994).
Only 31 species have been documented to use burrows of desert tortoises, including two birds, the common poorwill (Phalaenoptilus nuttallii) and burrowing owl (Athene cunicularia; Luckenback, 1982).
Lunar influence on foraging and nesting activity of Common Poorwills (Phalaenoptilus nuttallii).
Daily torpor in a free-ranging goatsucker, the Common Poorwill (Phalaenoptilus nuttallii).