!!!!! (Actually i started this some days ago but I didnt had time to finish)

1. It takes 0 energy for bats to hang upside down. When you want to grab something, you need to contract your muscles and tendons around it. With bats, their tendons function using their body weight to clench their paws. As they don’t need external energy besides gravity, they can stay in this position indefinitely, if they die that way they will stay hanging. They use high spots as they can't start fly by running as birds and need to use the gravity to start.

2. But not all bats hang, some use leaves to rest. As the leaves are smooth they have developed suction cup in their extremities. INCREDIBLE they just went ok time to become and spy. This is my favorite fact. Suction cups to hang on leaves

3. If you see closely in the picture, the lines in their wing are his fingers. Chiroptera, the order name, means hand wing. They have more maneuverability than birds when flying because their wings are more flexible due to their bones being able to bend (they are really thin so it's like bending a stick) and the fact that is skin. Also, they have receptors that allow them to feel changes in air currents (Bat tongues are larger than one imagines)

Unlike birds, they don't perch to feed. You can imagine them like hummingbirds drinking nectar, but at night 

4. This is the smallest (like 2 in and 3gr), he lives in my hearth and in Thailand. He does echo locate. Here are some other cool noses from micro bats. It works like an amplifier and to redirect their callings.

5. Phyllostomidae is the called leaf nose bats, and they comprise the vampire bats (3 species). These bats also have thermoreceptors in their noses. They don't suction blood, they just nick and have anticoagulant proteins that allow the blood to flow and lick it.  There were some try-outs to use those proteins to prevent hearth attacks  (Bat tongues are the cutest thing ever) Also they crawl, or at least they have better mobility on land than their cousins

6. They are social, mothers stay together and some have nursery roosts to give birth together. One pup by the mother and the mother carries them even when flying. Some caves can have hundreds of bats as they share heat. Which is a problem recently because of the white noose fungus that started in North America and is going south (probably spread by human cave explorers or hikers) It doesn't only irritate their lungs but also the fungus is itchy and wakes up hibernating bats. They lose a lot of energy by starting bodily functions again and most of them can't find food because it's winter.

Look this one, the pup is almost her size 11!!!!!