IUCN threat status:

Data Deficient (DD)

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Biology

Botos are usually observed either singly or in pairs although groups of up to 15 animals have been recorded (5). They appear to be most active during the early morning and late evening (5); slow swimmers they generally travel at around two kilometres per hour (2). Botos are reported to be playful and curious creatures, approaching boats and pulling on paddles as well as interacting with each other (2). Their flexible bodies allow botos to swim in shallow areas and to weave in and out of the trees in floodwaters; they are also known to swim upside down, possibly because their chubby cheeks make downwards vision difficult (2). Botos feed on a variety of fish and crab species (4); using echolocation to locate prey in the murky waters of the rainforest rivers (2). Females reach sexual maturity at between six and ten years of age and the gestation period is around 11 months (7). A single calf is born in July just as the water levels are beginning to drop, thus forcing fish back into the major waterways (7). The interval between births may be as much as five years, and botos are thought to live for as long as 30 years (7).

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Source: ARKive

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