Web1 de abr. de 1977 · In J. jacana and a closely related species, the Northern jacana (Jacana spinosa), both sexes have keratinized spurs used as weapons in aggressive interactions (Osborne and Bourne 1977;... WebThe northern jacana has a dark brown body with a black head and neck. In addition its bill has yellow patches and its forehead has a yellow wattle. Its bill has a white base. When …
Sex differences in nest construction, incubation, and parental ...
Weband because the Wattled Jacana is believed to be polyandrous (ffrench 1973), we investi-gated its breeding behavior and feeding ecol-ogy. STUDY AREA AND METHODS The … Web15 de nov. de 2014 · Stephens M: Interspecific aggressive behavior of the polyandrous Northern Jacana (Jacana spinosa). Auk. 1984, 101: 508-518. Google Scholar Brodsky LM, Ankney CD, Dennis DG: The influence of male dominance on social interactions in black ducks and mallards. Anim Behav. 1988, 23: 1371-1378. 10.1016/S0003-3472(88)80206-9. photographes troyes
Species and Sex Divergence in Vocalizations Between Hybridizing …
WebIt will also lead the chicks away from the nest within the next 24 hours. Young jacana chicks are called downies and have patterns of orange, browns, black and some white on … Web30 de nov. de 2024 · The northern jacana or northern jaana (Jacana spinosa) is a wader which is a resident breeder from coastal Mexico to western Panama, and on Cuba, Jamaica and Hispaniola. It sometimes breeds in Texas, United States, and has also been recorded on several occasions as a vagrant in Arizona 1. The jac Web8 de jun. de 2011 · large palegreenish yellow wing patches. Immature: Gray-brown above, whitish underparts; a broad white stripe over the eye. The extremely long toes and great lemon yellow wing patches, also the raillike flight, notes, and habitat, distinguish it from any shorebird. Listen to the sound of Northern Jacana. photographic access of light crossword clue