Ears
Tympanic Membrane = Eardrum on the outside of the head, such as with frogs and other amphibians. More useful underwater. +2 Hearing, +2 extra Hearing when in water.
Pinhole = Like those of birds and reptiles. Not visible on the nicheling. +2 Hearing, +1 Cold Resistance
Heads
Crushing Beak = A shorter, stockier beak for cracking hard nuts. For creatures like finches and macaws. +1 Collecting, +1 Cracking, +2 Smelling
Hooked Beak = A sharp, curved beak. For creatures like birds of prey. +1 Fishing, +2 Smelling, +1 Strength
Horns
Crest = +1 Attractiveness
Eyes
Farsighted Eyes = +4 Sight, -1 Smelling
Transparent Eyelids = +2 Sight, +2 extra Sight when in water
Bodies
Pouch Body - Allows a creature to carry one baby with it while traveling and to move onto the same tile as one, provided their pouch is empty. +1 Heat Resistance, +2 Cold Resistance, +1 Child Carrying, -1 Stealth
Hind Legs
Leaping Legs = Not actually flying, but mechanically, it would be practically identical to current flight. +2 Flight, +1 Swimming
Bird Legs (Drumsticks) = +1 Speed, +1 Swimming, +1 Digging
Tails
Nub Tail = No Bonus. Available by default.
Prehensile Tail = +1 Collecting
Balancing Tail = A long stiff tail, like that of a kangaroos, or a dinosaur. +1 Speed
