IUCN threat status:

Endangered (EN)

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Biology

There has been no biological study of the Campbell Island teal on Dent Island, with most knowledge of the bird coming from captive or post-release populations (8). Clutches are small compared to most ducks, consisting of one to five eggs, with a typical clutch size of three or four (6). In captivity, these are laid from October to January. The gestation period lasts for 30 to 34 days and both sexes can breed at one year (2). Campbell Island teal generally live to about 10 years, usually in pairs or small flocks (9). Pairs appear to demonstrate territoriality year round (2). This nocturnal bird has not been observed feeding on Dent Island, but feeds on amphipods, weevils, earthworms, seaweed and other insects in captivity, and has been seen eating invertebrates in piles of rotting seaweed on Codfish Island (6).

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Source: ARKive

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