Comportamiento de incubación del mirlo acuático (Cinclus leucocephalus) con notas del nido, huevos y polluelos
Nesting behaviour of the White-capped Dipper (Cinclus leucocephalus) with notes on nest, eggs and nestlings
DOI:
https://doi.org/10.59517/oc.e371Keywords:
andean rivers, Cinclidae, incubation behavior, nest, nesting, tropical birdsAbstract
The White-capped Dipper (Cinclus leucocephalus) is one of the two South American species from the family Cinclidae. We present a detailed description of the nestling biology and nest of C. leucocephalus. We found three active dome-shape nests, composed of moss and bamboo, located on rocky walls that bordered mountain rivers. Clutch size was two white eggs. Average nest attentiveness percent was 56.2%, which increased through the incubation period. During the first third nest attentiveness was 37.8% ± 16.2, increasing to 62.5%± 4.7 in the second period and reaching 65.8% ± 1.6 in the final period. We report 12 ± 3.7 daily nest departures with an average duration of 35.9 ± 29.1 minutes and an average daytime on-bouts of 104.4 ± 42.7 minutes. A nestling was monitored for 21 days until its nest departure. The rate of weight gain was 0.9 g/day and prior to nest departure the nestling attained 97.5% of the mean weight for adults. Cinclus leucocephalus is a passerine with long incubation, long nestling periods and specific requirements for nesting sites. The nest shape and composition appear to be an adaptation for extreme humid environments subject to heavy rains.
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