Northern cave bat facts for kids
Quick facts for kids Northern cave bat |
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| Conservation status | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Chiroptera |
| Family: | Vespertilionidae |
| Genus: | Vespadelus |
| Species: |
V. caurinus
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| Binomial name | |
| Vespadelus caurinus (Thomas, 1914)
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| Synonyms | |
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The northern cave bat (scientific name: Vespadelus caurinus) is a small, fascinating bat found across much of Australia. These tiny bats are known for living in caves and are part of a group called vesper bats. They play an important role in their environment by eating insects.
Contents
What Does it Look Like?
The northern cave bat belongs to a family of bats called Vespadelus. These are microbats, meaning they are very small and mostly eat insects. They often make their homes in caves.
Size and Appearance
These bats are truly tiny! They weigh about 2.3 to 4.2 g (0.081 to 0.148 oz), which is less than a small candy bar. On average, they weigh around 3.1 g (0.11 oz). Their forearm, from elbow to wrist, measures about 27 to 32 mm (1.1 to 1.3 in). Their head and body are about 32 to 40 mm (1.3 to 1.6 in) long, and their tail adds another 24 to 35 mm (0.94 to 1.38 in). Their ears are small, measuring 8 to 12 mm (0.31 to 0.47 in) from base to tip.
Their fur is a greyish-brown color. It's usually darker near the skin and a warmer brown towards their rump. These bats are also amazing flyers, known for their incredibly quick and agile movements in the air.
Life Cycle and Reproduction
Northern cave bats have their babies during the Australian summer. This season runs from around October to February. Each mother bat can give birth to one or two young during this time.
Lifespan
The Northern cave bat can live for a surprisingly long time for such a small creature! While many small mammals might only live for a few years, Northern cave bats have been known to live for up to 18 or 19 years in the wild. However, their average lifespan is often a bit shorter, usually around 6 to 7 years, because life in the wild is full of challenges.
Naming and History
The northern cave bat was first officially described in 1914. A scientist named Oldfield Thomas gave it its first scientific name, placing it in the Eptesicus genus. Later, it was moved to the Vespadelus group.
This species is one of several bats often called "cave vespadeluses." People also know it by other names, like the northern cave bat, little northern cave bat, western cave bat, or simply the little brown bat.
Where Do They Live?
You can find the northern cave bat in the tropical, monsoon-affected parts of Australia. Their home stretches from the Kimberly region in Western Australia, across the Top End of the Northern Territory, and into north-western Queensland, near the Gulf of Carpentaria.
Favorite Hangouts
These bats love to live inside caves or in piles of large rocks. They also find shelter under rocky overhangs or squeeze into small cracks and crevices on cliff faces. Sometimes, they even use places built by humans! This includes old, abandoned mines, empty buildings, and underground pipes like storm-water culverts. Interestingly, they have also been seen living in the mud nests built by fairy martin birds (Petrochelidon ariel).
The northern cave bat hunts for insects in monsoon forests and open woodlands. They prefer areas that are close to fresh, running water.
Neighbors in the Wild
Many northern cave bats live near the city of Darwin in the Northern Territory. They can be found in places like the Casuarina Coastal Reserve. Here, they sometimes use old observation posts that were built during the Second World War.
These bats often share their homes with other small bat species. For example, they might live alongside the common sheathtail bat (Taphozous georgianus) and the dusky leaf-nosed bat (Hipposideros ater).
The northern cave bat looks a bit like another species, Vespadelus douglasorum. However, V. douglasorum is usually larger and has hints of yellow in its fur. Both species live in the Kimberley region. It can be tricky to tell them apart from Vespadelus finlaysoni. Usually, you can tell by where they are found, as their living areas don't overlap. Also, V. caurinus generally has a forearm shorter than 32 mm (1.3 in) and is smaller overall, but this isn't always a perfect way to tell them apart because their sizes can vary.
Protecting the Northern Cave Bat
Good news for the northern cave bat! It is currently listed as a species of "least concern" by conservation groups in the Northern Territory and Queensland. This means that, for now, there are no immediate worries about this bat species disappearing.
See also
- Vespadelus caurinus for kids (in Spanish)
