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North American river otters usually give birth to one litter of pups a year, consisting of about three to four pups per litter. Though they often give birth as long as a year after mating, they ...
Delayed implantation distinguishes the species from the Eurasian otter, which does not do this. [41] [42] In early spring, expectant mothers begin to look for a den where they can give birth. The female otters do not dig their own dens; instead, they rely on other animals, such as beavers, to provide suitable environments to raise their offspring.
In the wild, dogs are actually one of the greatest dangers to river otters and especially river otter pups. And sometimes the relationship can be dangerous in the other direction, as groups of ...
Related: Adorable Sea Otter Making ‘Otter Biscuits’ Is Too Cute To Resist "The little otter and his sweet paws waiting to be fed at the aquarium," Rach wrote in the video's onscreen caption ...
Otters' habitats include dens known as holts or couches, with their social structure described by terms such as dogs or boars for males, bitches or sows for females, and pups or cubs for offspring. Groups of otters can be referred to as a bevy, family, lodge, romp, or raft when in water, indicating their social and playful characteristics.
The class Mammalia is divided into two subclasses based on reproductive techniques: monotremes, which lay eggs, and therians, mammals which give live birth, which has two infraclasses: marsupials/metatherians and placentals/eutherians. See List of monotremes and marsupials, and for the clades and families, see Mammal classification ...
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The smooth-coated otter is a relatively large otter species, weighing from 7–11 kg (15–24 lb) and measuring around 59–64 cm (23–25 in) in head-body length with a 37–43 cm (15–17 in) long tail.