how many pups do they give birth to?
Litter size can reach five, but usually ranges from one to three.
North American river otter
When the mothers have established their domains, they give birth to several kits. Litter size can reach five, but usually ranges from one to three.
where do river otters live in the winter They travel drastically less during winter. is this creature a mammal, reptile, amphibian, or any other? Mammal how long can this creature live underwater? 4 minutes do they have a special respiratory system or any other metabolic adaptations to survive underwater for so long? The right lung of the North American river otter is larger than the left, having four lobes compared with two for the left. Reduced lobulation of the lungs is presumed to be adaptive for underwater swimming. In addition, the length of the trachea of the North American river otter is intermediate between that of terrestrial carnivores and marine mammals. The mean tracheal length of the North American river otter is , or 23.2% of the body length. A shorter trachea may improve air exchange and increase lung ventilation in diving mammals. how do they communicate? Communication among them is accomplished mainly by olfactory and auditory signals. Scent marking is imperative for intergroup communication. at what age do females start reproducing? Females usually do not reproduce until two years of age.
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North American river otter [SEP] Reproduction and life cycle
Litter size can reach five, but usually ranges from one to three. Each otter pup weighs approximately five ounces. At birth, the North American river otters are fully furred, blind, and toothless. The claws are well-formed and facial vibrissae (about long) are present. The kits open their eyes after 30–38 days. The newborns start playing at five to six weeks, and begin consuming solid food at 9–10 weeks. Weaning occurs at 12 weeks, and females provide solid food for their progeny until 37–38 weeks have transpired. The maximum weight and length of both sexes are attained at three to four years of age.