Dagron creatures are usually fluffy, serpent-like fellas with dragon-like front feet.
-no, they don't breath fire, but depending on the subspecies they can be resistant to fire, ice or accids-
Aeral dagrons are mostly fire or ice resistant subspecies, they like high places (they can be often found on mountains, cliffs or high up in tree crowns), depending on their environment they can rarely have accid resistence instead of fire or ice one.
These dagrons are harder to get friendly with, they are naturally shy, and usually group up in small flocks of 3-10 dagrons, but once they get used and accept someone as a part of the flock, they make good companions, and might be a bit overreacting when the person "dissapears" to place they can't see, so they'll be loudly calling and searching all over the place (kinda in a small panic manner).
Aeral subspecies can have similar features to ground subspecies, horns and spikes, large fangs, feathers/feathered parts of body, scales/scaly body parts, but with addition of dragon-like wings, bird-like wings, bat-like wings or fish fin-like wings (the wings can be occassionally in multipple pairs too).
Other general information about dagrons here