They are vengeance, they are the night, they are... named after Ozzy Osbourne. As they are a relatively newly-discovered species (2009) they don't yet have an agreed upon common name. However, 'bat frog' has been used to refer to them due to their high-pitched chirping call which sounds similar to a bat using echolocation. (They hunger for justice as well as bugs)
Sad irony
Ugh...
When Froppy makes u rock hard