Yes, a deer is a mammal.
Mammals
people, livestock, deer, and other small mammals.
Yes, deer are all mammals. They have a 4-chambered heart, a body covered with hair or fur, suckle their young, etc.
Deer are mammals.
Vampire bats eat/drink the blood of mammals such as deer.
K. K. Flerov has written: 'Musk deer and deer' -- subject(s): Deer, Mammals, Musk deer, Musk-deer 'Fauna of the U.S.S.R., mammals' -- subject(s): Artiodactyla, Mammals
Yes, deer are placental mammals.
They are mammals. Mammals have backbones.
Deer are mammals. All mammals on the planet have spines. Therefore deer are vertebrates.
White tail deer are mammals. All mammals are warm blooded.
sheep and deer are animals they are mammals.
No, because they are mammals and mammals don't lay eggs (the duck billed platypus is an exception).