After donating all of the pieces of the velociraptor to the museum in City Folk, Blathers will give the player information on the creature with the following dialogue.
"Velociraptors first began to appear in the last days of the dinosaurs. Their bodies were small, but they could run fast and were smart enough to use teamwork...In some respects, they were the best hunters in the dinosaur world!"
In New Leaf
In New Leaf, a plaque by the display offers information about the fossil instead of Blathers.
"Usually just called raptors, they're also known as velociraptors, which literally means "swift seizers." They had large heads for their bodies, so theories suggest they were relatively intelligent. Though not imposing in stature, they had large and deadly claws on their hind legs."