|Episode Appearances|| "Genesis" (heard only)
Multiple additional episodes, unidentified (heard only)
Howler is the nickname of a species of dinosaur that emits strange noises in the jungle.
In Terra NovaEdit
Howlers can also be heard in a few other scenes, such as multiple times in "Bylaw". Because they are not mentioned every time they are heard, it is very difficult to identify every episode they have been heard in.