|"Look at you two! You are so lazy!"|
|— Sokka shouting at Appa and Momo.|
"Night Animals" is a comic book that takes place in Book Three: Fire, originally released by Nickelodeon Magazine in April 2008 and later released by Dark Horse Comics in Avatar: The Last Airbender — The Lost Adventures.
Having discovered Fire Nation troops patrolling Team Avatar's campsite, Appa and Momo take it upon themselves to protect their friends from danger.
While the rest of Team Avatar is asleep by a dying fire, Momo awakens Appa and leads him to a thicket, which they hide behind while they spy on two Fire Nation soldiers. Knowing what it could mean for the group if they are discovered by their enemies, Appa, with Momo on one of his paws, rears up out from his hiding place and roars at the soldiers, causing them to run away in fright.
The next morning, Aang, Katara, and Toph feast on mangoes that Momo collected after the confrontation the previous night, thanking Sokka for the fruit. Naturally, Sokka does not remember having picked them, but accepts the praise nonetheless. A moment later, he berates Appa and Momo, who are sleeping now due to a restless evening, for their laziness, reminding them that they have a big day ahead of them.
- Main article: Transcript:Night Animals
- Sokka's sleep muttering of "... Not another dance party ... must stay on schedule ..." is an allusion to "The Headband".
- This is, when considered chronologically by the plot of the series, the second consecutive comic to allude to "The Headband", the previous being "Private Fire".