How to translate text using browser tools
6 January 2023 Breeding biology and ecology of the Little Tinamou (Crypturellus soui) in southwestern Colombia
Germán A. Corredor-Londoño, José William Beltrán, Inge Armbrecht
Author Affiliations +

The breeding biology and ecology of the Little Tinamou (Crypturellus soui) is poorly known due to its secretive habits and cryptic coloration. We used radio telemetry and temperature data-loggers to monitor radio-tagged tinamous and nests in the subtropical wet forest life zone in a protected rural site near Cali, Colombia, between February 2013 and March 2015. Population density was higher on a transect in continuous primary forest than in 3 transects in second-growth forest fragments. Peak breeding occurred during the main rainy season of September–December. Simultaneous female and male home range overlap during incubation indicates behavioral monogamy in 4 radio-tagged pairs. The absence of female home range overlap with that of an incubating male suggests an instance of polygynandry. Male home range size was greatest prior to breeding (3.76 ± 2.31 ha, minimum convex polygon) and decreased in size during the egg and chick stages. Parental care was provided only by males, which displayed moderately high nest attendance during incubation (77.5% ± 4.5% on nest per 24 h period) and while foraging with chicks after hatching. Females vocalized more frequently and with different vocalizations than males. Females were larger than males in body mass (by 8.8%), body length (by 9.5%), tarsus (by 9.4%), and wing (by 9.4%). Our sexual dimorphism findings are consistent with female defense of territory. Adults were diet generalists, 72% ± 29% of the fecal samples examined contained material of 9 plant species and 9% ± 13% of the fecal samples contained pieces of 4 orders of arthropods.

La biología reproductiva y ecología del tinamú chico (Crypturellus soui) es pobremente conocida debido a sus hábitos huidizos y coloración criptica. Entre febrero 2013–marzo 2015, utilizamos radio telemetría y data loggers de temperatura para monitorear individuos con radiotransmisores y nidos en una zona rural protegida cerca de Cali, Colombia. El traslape simultaneo de áreas de ámbito doméstico durante la incubación en 4 parejas de adultos indica monogamia conductual. La ausencia de traslape del área de ámbito doméstico de la hembra con el macho que se encontraba incubando sugiere un caso poliginandria. El área de ámbito doméstico de los machos fue más grande previo a la anidación (3.76 ± 2.31 ha, polígono mínimo convexo) y disminuyó su tamaño durante las etapas de huevos y polluelos. El cuidado parental fue realizado solamente por machos, que mostraron una atención del nido moderadamente alta durante la incubación (77.5 ± 4.5% sobre nido por un periodo de 24 h) y mientras forrajea con los polluelos después de la eclosión. Las hembras vocalizaron más frecuentemente y con diferentes cantos que los machos. Las hembras presentaron mayor masa corporal (8.8%), longitud corporal (9.5%), tarso (9.4%) y ala (9.4%) que los machos. Los resultados de dimorfismo sexual son consistentes con defensa de territorio. Los adultos tuvieron dietas generalistas, 72 ± 29 % de las muestras fecales examinadas contenían material de 9 especies vegetales y 9 ± 13 % de las muestras fecales contenían fragmentos de 4 órdenes de artrópodos.

Palabras clave: anidación, área de ámbito doméstico, densidad poblacional, dieta, incubación, reproducción, vocalizaciones.

Germán A. Corredor-Londoño, José William Beltrán, and Inge Armbrecht "Breeding biology and ecology of the Little Tinamou (Crypturellus soui) in southwestern Colombia," The Wilson Journal of Ornithology 134(4), 667-681, (6 January 2023).
Received: 2 April 2022; Accepted: 29 September 2022; Published: 6 January 2023
home range
population density
Get copyright permission
Back to Top