“Black mott” … medium star (referring to the size of a white shape in the forehead) or maybe heart head … also, “brown beard”
Small, “baby faced”
“Airplane ears” (extend to the side) … yellow #30 tag in the left ear
Classic Limousin breed head shape … wide forehead … box-like
Rounded with “bangs”
Light around the eyes (if you had a group of all Limousins, the rather obscure pink skin “rectangle” under the left eye might be noted to distinguish him from the others)
Huge cow-lick/swirl in the middle of the forehead … light nose
Describing cattle takes practice, and again, it’s not a perfect science.
I suggest that you get an order to the sequence as you describe their characteristics as noted above (breed and color first, for example) and go from there.
Have fun with this! Gather a group of friends. During the open class, for example, begin to describe cattle physically as they are being settled. Make it a learning game.
Then, if you can hear the herd helpers in the bleachers as the open riders show, listen to their descriptions, too. The more you observe and practice, the more comfortable you will become.