Amber Mosquito

The Amber Mosquito is a Pet summoning item that spawns a baby dinosaur to follow you around. If you jump too high into the air, a pterodactyl will carry your dinosaur by the tail. The baby dinosaur is immune to damage from enemies and despawns upon player death. This item can only be obtained by putting Silt or Slush into an Extractinator, with a 1 in 5000 chance.

Trivia

 * This item is a reference to the film Jurassic Park, where dinosaurs are cloned using blood found in mosquitoes trapped in amber.
 * Even though there is an item called Amber, you can't seem to use it for crafting; instead you get it from the Extractinator