I think thatd be a tree frog. Anywho... Its very small... So id say feed it fruit flies. Go to a petstore and buy them. Or just catch em yourself. Leave a jar with an orange in it and make sure it has a mesh. The flies will pass through the mesh. But when you want to catch em in. You can get the lid and itll take time for them to get out. Make sure the mesh is small. Like pinholes.
Because it needs to eat small foods.
Good luck hope this helps.