Little Brown Bat

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The little brown bat is between 6 and 10 cm in length, weighs between 2 and 14 grams and has glossy brown fur on the back with slightly paler, greyish fur underneath. The wing membranes are dark brown with a typical wingspan of 20 to 30 cm.

Complaints & Destruction

Though bats are very beneficial to the environment, they are not beneficial to your residential, recreational or commercial properities. Each bat living in your home will excrete the equivalent of its bodyweight in droppings known as guano and urine every day. The combination of guano and urine can create strong offensive odours, transmit potentially life threatening diseases, and deteriorate just about any building material it contacts causing considerable damage to your property.


The little brown bat mating season is in the fall, however, fertilization happens in the spring. When they arise from hibernation in the spring, the females form nursery colonies which may consist of thousands of bats. Gestation lasts between 50–60 days. The female gives birth to one baby each year, sometimes twins, born between May to July. The young cling and feed from their mother constantly until they are two weeks old. At three weeks, they learn to fly and by four weeks, the young are adult sized. Most bats are sexually mature in the fall after their birth.

Eating Habits

Little brown bats are insectivorous, eating many kinds of night-flying insects including mosquitoes, moths, beetles, and wasps, which they capture in flight.


To reduce the risk of bats nesting in your residential, recreational/cottage, or commercial property, bird proofing/exclusion is the best prevention.

Greenshield Pest Control Inc. can provide you with many bat exclusion/proofing services and solutions.

CLICK HERE to see our Bat Control Proofing /Exclusion Services and Solutions.

Due to the dangers associated with bat bites and feces, you should never attempt to exclude a bat infestation yourself. If you have a colony of bats nesting in or around your residential, recreational/cottage, or commercial property, it is best to let the professionals do the job of safely and humanely removing the bats, decontaminating the areas affected, and providing you with exclusion/proofing services to prevent further infestations. Please contact us today or see our Bat Control Services section for further information on the types of services and solutions we can provide.

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