This poor creature was found on my deck. In order to identify it, I used a taxonomic key. The key required that I make measurements, such as the length of the forearm. I was brave (or foolish) to pick up the bat, but I did wear gloves. The bat turned out to be an Evening Bat, a common insectivorous species. On top – This “bat house” is a good example of a roost you can erect to bring bats to your yard. Bats are enormously important to the well-being of our planet. The more than 900 species worldwide pollinate plants, eat crop pests and carry seeds to new locations. Evening Bats especially benefit from us humans erecting artificial roosts for them.