Notes on the nesting of Common Potoo (Nyctibius griseus) in the valley of Rio Cauca (Cali, Colombia)

Thee Common Potoo (N. griseus) is distributed from west Mexico to northern Argentina and Uruguay. Despite its wide distribution, information regarding its natural history is sparse, in particular concerning its nesting behavior. In this study, we present detailed breeding biology information based on four nests monitored in Cali, Colombia (Rio Cauca valley). Nests were concavities on the top of truncated branches where one white egg with lilac and light brown speckles distributed over the entire surface was laid. Based on nest temperature loggers the parents incubated continuously through the day. The first foraging trip in the evening at 18: 34 +/- 00:06h (range = 18:24-18:53 h) interrupted incubation until the start of the nocturnal incubation shift at 19: 08 +/- 00: 07 h (range = 19:00-19:15 h). Nest attentiveness was 95.03 +/- 0.98% (n = 1 nest). The nestling period lasted 46 days (n = 1 nest), and nestling growth rate (K) was 0.124. Nest shape, egg coloration, and parental care recorded in our study were consistent with previous reports for N. griseus and other species of the genus. However, nest attentiveness and growth rate of nestlings were higher compared with other studies.