Read the following passage. Pick out all the nouns, adjectives, verbs, adverbs and pronouns.
Bighorns have excellent eyesight. They also have very sharp senses of smell and hearing. Their ears, though small, are very sensitive. It is almost impossible to sneak up on them. Bighorns are social animals and live in herds. Male bighorns are called rams. Female bighorns are called ewes. Rams with the largest horns are the natural leaders of the ram herds while old ewes usualy lead the ewe herds. The two herds live separately for most of the year but join shortly before winter.