Animal Age

How old does a Big brown bat get? (age expectancy)

What is the maximal age a Big brown bat reaches?

An adult Big brown bat (Eptesicus fuscus) usually gets as old as 20 years.

Big brown bats are around 52 days in the womb of their mother. When born, they weight 3 grams (0.01 lbs) and measure 8 cm (0′ 4″). As a member of the Vespertilionidae family (genus: Eptesicus), a Big brown bat caries out around 1 little ones per pregnancy, which happens around 1 times a year. Fully grown, they reach a bodylength of 13.8 cm (0′ 6″).

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.

A Big brown bat gets as old as 20 years

The big brown bat (Eptesicus fuscus) is a species of vesper bat distributed widely throughout North America, the Caribbean, and the northern portion of South America. It was first described as a species in 1796. Compared to other microbats, the big brown bat is relatively large, weighing 15–26 g (0.53–0.92 oz) and possessing a wingspan of 32.5–35 cm (12.8–13.8 in). Big brown bats are insectivorous, consuming a diverse array of insects, particularly night-flying insects, but especially beetles. Some of the beetles it consumes are serious agricultural pests, including cucumber beetles. They are nocturnal, foraging for prey at night and roosting in sheltered areas during the day such as caves, tunnels, tree cavities, and human structures. Their breeding season is in the fall, shortly before their annual hibernation. After hibernation ends in the spring, females form maternity colonies for giving birth to young. Oftentimes only one offspring is produced per litter, though twins are common in the Eastern US. Lifespans of 6.5 years are considered average. The big brown bat occurs widely throughout the US, Canada, Central America, and the Caribbean. Its range extends into parts of South America, found as far south as Colombia and Venezuela. It is adaptable to many habitats and is considered a generalist species. The big brown bat is not considered at risk for extinction, and is evaluated as the lowest conservation priority by the International Union for Conservation of Nature (IUCN). While some other bat species in its range have experienced dramatic population declines due to the fungal disease white-nose syndrome, the big brown bat is relatively resistant to the effects of the disease, and some populations have even increased since the syndrome arrived in North America. Like all bats in the US, the big brown bat can be impacted by rabies, though some individuals have immunity against the virus. Even though sick bats are more likely to be submitted for testing, in 2011, only 3.8% of submitted big brown bats were positive for the rabies virus. Bat boxes are sometimes used to attract them as they are an agriculturally valuable species.

Animals of the same family as a Big brown bat

Not really brothers and sisters, but from the same biological family (Vespertilionidae):

Animals that reach the same age as Big brown bat

With an average age of 20 years, Big brown bat are in good companionship of the following animals:

Animals with the same number of babies Big brown bat

The same number of babies at once (1) are born by:

Weighting as much as Big brown bat

A fully grown Big brown bat reaches around 17 grams (0.04 lbs). So do these animals: