They are just being wary, they study you, making sure your not a threat to them like a hunter.
it looks like a regal deer
Oh dear, you poor little deer! Oh dear, look at the big deer!
a deer that is the size of amouse!
... a deer?
Yes it is. For example, you would say "There are many deer in the park today", not "There are many deers in the park today". It is both singular ("Look at the deer") and plural ("Wow there are a lot of deer over there").
live in the woods and eat. they give us meat.
They look like deer scats
Deer scat looks a pile of brown ping pong balls.
There is a mythical animal called a jackalope that had the body of a rabbit and the antlers of a deer.
Spotted
Blue
Cheetahs hunt antelope and gazelle. Although antelope and gazelle look similar to deer, they aren't deer. Deer have antlers, which they shed, while antelope and gazelle have permanent horns.