Is a anaconda a mammal

Answer 1

No, anacondas are not mammals: they're reptiles. All snakes are reptiles.

The word "reptile" means an animal that belongs to the taxonomic class Reptilia; "mammals" belong to the taxonomic class Mammalia.

One big difference between reptiles and mammals is that mammals have mammary glands (and breasts, and the ability to produce milk), and they give birth to live animals, while reptiles lay eggs instead and produce no milk (although reptile venom is sometimes called "milk," it isn't truly milk).

Something mammals and reptiles have in common is that they're both vertebrates, which means they belong to the taxonomic subphylum Vertebrata -- this means they both have backbones and spinal columns (unlike, for example, insects).

Answer 2

No - it's a reptile - specifically a member of the snake family.

Answer 3

Garter snakes and all other kinds of snakes are reptiles, not mammals.