What derogatory adjective, meaning foolish or flighty, is named after a senseless animal?

Dodo

DINGBAT although that isn't an animal

DODO extinct bird Some of the birds may have been eaten by the Dutch sailors who discovered them. However, the primary causes of their extinction were the destruction of the forest (which cut off the Dodo's food supply), and the animals that the sailors brought with them, including cats, rats, and pigs, which destroyed Dodo nests.

ASININE and ANSERINE

There are a ton of words like avian (birdlike), simian (ape or monkeylike), canine (doglike) and feline (catlike) that are adjectives to descripe people as well, The words meaning like an *** (the animal) or like a goose are two, both meaning foolish or silly:

From http://dictionary.reference.com/browse/asinine

as·i·nine -. foolish, unintelligent, or silly; stupid

2. of or like an ***

Also, notice especially definition three from http://dictionary.reference.com/browse/anserine

an·ser·ine

1. of or pertaining to the subfamily Anserinae, of the family Anatidae, comprising the true geese.

2. resembling a goose; gooselike.

3. stupid; foolish; silly.

EDIT nookie 18 has named a few animals that have adjectives like the ones cited. I've already given you gooselike (anserine). Wolflike is lupine. Squirrellike is sciurine. There are several for snakelike: ophidian, serpentine and viperine. But of these, only anserine is silly or foolish.

firstly , NO animal is "sense-less" , but most derogatories come from Humans...!

Goose...acting like a.

Squirrel...hiding every-thing of in-value. (for no reason).

Snake...mad(crazy)as a cut one = (hurt).

Wolf-ish...cunning and on the Hunt.

will that do?

must.......let......others.....contribute......al...so!

you should have typed ADJECTIVE in capitals....some folks didn't get that.

dingbat

cuckoo