Both are amniotic oxygen-breathing vertebrates.
For one thing most reptiles are born from eggs, while most mammals give live birth. Second, reptiles are cold blooded, while mammals are warm blooded. Unlike mammals, baby reptiles are able to fend for themselves.
One characteristic all reptiles share is that they are all cold-blooded.
There are a variety of features but one is the number of fenestrae in the skull. Mammals also have more differentiated teeth than reptiles. Furthermore, you can look at the gait. Mammals have a parasagittal stance, while most reptiles have a sprawled stance.
All are vertebrates.
Birds and mammals are air breathers. Lampreys are not.
Birds are neither mammals, nor reptiles. They are an entirely different branch of evolution. However, they are more closesly related to reptiles, which they descended from. Their evolution from reptiles caused them to resemble mammals.
Dolphins are warm blooded like other mammals.
Reptiles and fish lay eggs and can't sit in one place waiting for them to hatch like birds
Spiny anteaters, more correctly known as echidnas, are mammals, not reptiles. Although they are one of two types of monotremes (egg-laying mammals), they have all the other characteristics of a mammal. They have skin covered in fur and quills, not scaly skin like reptiles have. The primary difference is that they feed their young on mothers' milk. This is the defining characteristic that classifies them as mammals.
One of the main differences is independence ! Most baby mammals require sustenance from the mother in order to grow and develop (like puppies, kittens, baby pigs etc suckling from the mother animal) - Baby reptiles are completely independent from the moment they're hatched (or born) - and quickly go off in search of their first meal.
a few but not all and i only have one to share with you, the bat
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).