Introduction: BAT NEST

Bats will travel for km's for finding food, especially fruit bats.

Buildings and concrete have forced the bats to move out of the cities. This small creature has a lot to offer and we should help it in anyway we can.

This is an instructable for building a simple nest for the bats i have flying round my house. I believe its a good idea to keep them around. They help a lot in controlling the number of small insects, especially mosquitoes.

The aim is to built a small, cheap, light-proof box. (is light-proof a word?)
The idea is for the bat to be able to grab on the mesh wire and walk / climb her way up inside the nest.

Step 1: Tools

No special tooling needed. A sharp hand saw, and a screwdriver or hummer will do the job but any other electric tools are welcome :)

I used a miter saw, a band saw, a drill and a nail gun.

Step 2: Materials

The material to be used is wood and fine mesh wire. No glue and no paint/varnish is needed. For my prototype, i will use scrap osb wood. It is light, weather proof and free. The osb was part of an old dog-house from a neighbor.
The mesh wire is taken from an old cooker hood.

For the final product, i will use 8mm marine plywood.

Step 3: Template

Measure twice, cut once. These are the parts dimensions and the parts transferred on the osb. Make sure you do straight cuts. Upon assembly, the light must be kept out, so a firm straight joint is necessary. The piece i had was 52x63cm, which was more than enough.

Step 4: Parts

These are the parts cut. The saw dust aids in visual drama :)

Step 5: Assembly

Time to put the pieces together. Can be either screwed or nailed. Either way, keep it simple.I used nails for this attempt.

First nail the two sides and in between nail the mesh wire. Then the front, the roof and the bottom lid. Finally, the long piece behind it for hanging/fastening.

Step 6: Final Prototype

This is the finished prototype.

Step 7: Finished Nest

This is the final design. I used 8mm marine plywood and tried to give some optical beauty to the nest. Hope to be more attractive to the bats :)

I miter cut the pieces for a better fit, used hinges for the bottom lid (helps the observation) and fastened the mesh wire on three wood rails. This way, there is a space between the wire and the rear flat. Also, a series of small holes on the front help the air circulation.

Hope you liked it and more important, i hope you built one outside your house. Bats need a good home :)

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    11 Discussions

    Buena idea! voy a realizar esta casa para murciélagos con un orificio para poner una cámara IR barata (de seguridad 40 Euros) y observarlos.

    2 replies

    Bats routinely nest in attics - in other words hot spaces. So, having a southeastern exposure is ideal. It warms up quickly in the morning then doesn't get too hot during the day.

    In addition, drill a series of small holes just beneath the top to allow some ventilation.

    1 reply

    I will have to agree on the aspect. South to southeastern is the best aspect for the nest. But i dont know about the holes. They will definetely help ventilation but also allow for light to pass through

    How sensitive are they to heat through the day? Would an elevated box need to be ventilated, or at least shaded through the day?

    5 replies

    One of factors affecting bats' biology is temperature. Some species, during very low temperatures tend to hybernate. So, it is best to place the nest on shaded places, if during summer you experience high temperatures and exposed to sun if during winter you experience low temperatures. Also, ventilation will help to lower the temperature in the nest.

    Thank you for the reply.

    Here in Southern Indiana I've seen near 70 degree swings through 24 hours. I don't heckle people wearing jackets and shorts. Socks and sandals... any way.

    My wife and I are definitely going to work on this, but placement will have to be on a shaded side of the house and hope we don't end up freezing the fellows.

    Wow, 70degrees? Thats a big variation. I am so happy that at least one of the thousands of members will build my nest. I wish you all the best.

    Rare occasion its close to that, a bit exaggerated. But I have seen a frosty morning turn into a 90+ degree day, brutal.

    Signs of our times ?. Global climate change is at our doorstep.