Common Poorwills (Phalaenoptilus nuttallii; hereafter poorwill) are the smallest North American caprimulgid (45-50 g), and are one of the least understood of all North American birds, principally because of their cryptic coloration and nocturnal habits (Csada and Brigham 1992).
Field metabolic rates and body mass changes in Common Poorwills (Phalaenoptilus nuttallii: Caprimulgidae).
2005) reported that both male and female Common Poorwills
brood, but provided no details concerning the contributions of each sex.
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).
Roost-site characteristics of Common Poorwills
, Phalaenoptilus nuttallii, in Saskatchewan.