Nesting biology of <i>Nyctiphrynus rosenbergi</i> and <i>Nyctiphrynus ocellatus</i>

We observed biparental care, with females primarily tending the nest during the daytime while males tended at night. The <i>N. ocellatus</i> nesting location was like that of <i>N. rosenbergi</i>. Clutch size ranged from one to two eggs, but the laying of two eggs was observed more frequently (84% of nests).

Eggs appeared white, cream, or pale pink in colour, with small brown spots or pink lines, measured an average of 26.5 ± 1.1 by 19.5 ± 1.2 mm and weighed an average of 5.4 ± 0.7 g. The incubation period was 22 days (n = 1). Biparental care was observed, with females primarily caring during the night and males during the day.

The longest nestling period was 9 days (<i>N. rosenbergi</i>) and 5 days (<i>N. ocellatus</i>). Understanding the nesting biology of these two species within the genus <i>Nyctiphrynus</i> will fill a gap in our knowledge for the Neotropical portion of the family Caprimulgidae.</p>