In addition to common nighthawks, whip-poor-wills and chuck-will's-widows, five other species of goatsuckers live in North America: the lesser and Antillean nighthawks, buff-collared nightjar, common pauraque
, and the common poorwill, one of only a handful of birds known to go into torpor, a state akin to mammalian hibernation.
A preference for river habitats was detected for the common pauraque ([chi square] = 6.
DISCUSSION-The nine species of night birds we documented (including two, the common pauraque and elf owl, with restricted ranges within the USA) was greater than in most other parts of the country.
Numbers of lesser nighthawks were twice those of the common pauraque on Galvan Ranch.
We examined habitat preferences (river versus pond) of great horned owls (Bubo virginianus), eastern screech-owls (Megascops asio), elf owls, lesser nighthawks, common poorwills (Phalaenoptilus nuttallii), and common pauraques (Nyctidromus albicollis) by determining presence and absence for each species at each of the 19 sites (evaluated for each species using a two by two chi-square test).