What is the maximal age a Keen’s myotis reaches?
An adult Keen’s myotis (Myotis keenii) usually gets as old as 18.5 years.
When born, they weight 2 grams (0 lbs) and measure 2.9 cm (0′ 2″). As a member of the Vespertilionidae family (genus: Myotis), a Keen’s myotis gets offspring up to 1 times per year. Fully grown, they reach a bodylength of 4.4 cm (0′ 2″).
As a reference: Usually, humans get as old as 100 years, with the average being around 75 years. After being carried in the belly of their mother for 280 days (40 weeks), they grow to an average size of 1.65m (5′ 5″) and weight in at 62 kg (137 lbs), which is obviously highly individual.
Keen’s myotis (Myotis keenii) is a species of vesper bat. It is found in British Columbia in Canada and in Washington and Alaska in the United States. It is named after the Rev. John Henry Keen, who collected the specimen that formed the basis for the first scientific description of the species. Classification for Keen’s myotis formerly included the Northern long-eared Myotis (Myotis septentrionalis), resulting in older studies confusing the species for one another.
Animals of the same family as a Keen’s myotis
Not really brothers and sisters, but from the same biological family (Vespertilionidae):
- Southeast Asian long-fingered bat with 1 babies per pregnancy
- White-winged serotine bringing the scale to 5 grams
- Spotted bat with 1 babies per pregnancy
- Rohu’s bat bringing the scale to 12 grams
- Brown tube-nosed bat bringing the scale to 4 grams
- Black myotis becoming 3.5 years old
- California myotis becoming 15 years old
- Melck’s house bat with 1 babies per pregnancy
- Gray bat becoming 39.25 years old
- White-bellied yellow bat with 1 babies per pregnancy
Animals that reach the same age as Keen’s myotis
With an average age of 18.5 years, Keen’s myotis are in good companionship of the following animals:
- Cape genet usually reaching 15 years
- Nine-banded armadillo usually reaching 15 years
- Yellow-backed duiker usually reaching 17.25 years
- False killer whale usually reaching 22 years
- Sable usually reaching 15 years
- Northern bat usually reaching 15.5 years
- La Plata dolphin usually reaching 16 years
- Gray fox usually reaching 15 years
- Bontebok usually reaching 21.67 years
- Eastern lesser bamboo lemur usually reaching 17.08 years
Weighting as much as Keen’s myotis
A fully grown Keen’s myotis reaches around 6 grams (0.01 lbs). So do these animals:
- Dent’s horseshoe bat with 6 grams
- Schmidts’s big-eared bat with 7 grams
- Dormer’s bat with 6 grams
- Cape serotine with 6 grams
- Tundra shrew with 7 grams
- Honduran white bat with 5 grams
- Marshall’s horseshoe bat with 5 grams
- Rendall’s serotine with 6 grams
- Beatrix’s bat with 7 grams
- Scully’s tube-nosed bat with 5 grams