Thursday, 15 May 2014

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African Jacna

This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations).
The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

This species is nomadic in relation to changing water levels with some individuals travelling as far as several kilometres between suitable habitats (del Hoyo et al. 1996). The species may breed in any month of the year in permanent wetlands but only during the wet season in seasonally flooded areas (del Hoyo et al. 1996).
It has a polyandrous mating system, with males holding nesting, breeding, foraging and chick-rearing territories while females mate with several adjacent males (del Hoyo 
et al. 1996). The species forages singly, in pairs or in dispersed family groups (Urban et al. 1986) and may occasionally gather in small, loose flocks (Hayman et al. 1986).
African Jacana
 African Jacana
 African Jacana

African Jacana



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