Bat is a mammal, so it's outer covering is hair whereas bird's outer covering is feather.
Birds are covered with feathers. Bats are covered with hair.
A rich red/brown fur on the body and silver grey on the head.
what is seahorse outer-covering
The outer covering of the eyeball is cornea.
Amphibians do not have outer covering.
A seals outer covering is thick skin.
an ant's outer covering is their exoskeleton
Camels have hair as their outer covering.
Tonoplast is the outer covering of vacuole
The outer covering of a prawn in a shell.
The outer covering of the grain is called Husk.