I "setup" a birdhouse a couple of years ago in a piece of land I own on the coast. It is 10000 mq with 80 olive trees and a number of fruit trees. That model of birdhouse is specially designed to host bats, in fact is called "bat box".
I'm unable to add the text on the batbox at the moment, as it is 2 hours by car from my home, but I hope you like it anyway.
I tweeted the giveaway ann: https://twitter.com/BitcoinGarden/status/852848873718546433
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Nice birdhouse by the way i like it,,will setup like that when i have a material