Penis
Domestic cats have barbed penises, with about 120–150 one millimeter long backwards-pointing spines. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation. Lions also have barbed penises. Male felids urinate backwards by curving the tip of the glans penis backward. When male cheetahs urine-mark their territories, they stand one meter away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward.
Little brown bat
It has a relatively short snout and a gently sloped forehead.
It lacks a sagittal crest, which can be used to distinguish it from the Arizona myotis.
Its skull length is .
The braincase appears nearly circular though somewhat flattened when viewed from the back.
Its ears are long, while the tragi, or cartilaginous flaps that project in front of the ear openings, are long.
The tragi are blunt at the tips and considered of medium length for a mouse-eared bat.