Here's the passage with the identified errors corrected:
My friends, I went to the zoo last week. It was a bright, sunny day, and all of the animals were lively. There was a big, ferocious lion sitting on top of a large rock. Close by, some loud, lively monkeys were romping about on a tire swing. A tired, old tortoise stretched his neck up into the air. There were also some tiny, timid lizards hiding behind rocks, logs, and any other place they could fit. They were all placed in terrariums next to some cute, fluffy rodents. There was much to see on that fun, exciting day.