Baby Beaver . Baby beavers are called kits, or kittens. They are usually born in litters of two to five animals. They remain in the lodge for the first month of life, and then stay with their parents in a family group for two years.
Led Zeppelin IV was a commercial and critical success, producing many of the band's most well-known songs, including  Black Dog ,  Rock and Roll ,  Misty Mountain Hop ,  Going to California , and the band's signature song,  Stairway to Heaven .he untitled fourth studio album by the English rock band Led Zeppelin, commonly referred to as Led Zeppelin IV, was released on 8 November 1971 on Atlantic Records.
Nicky Hopkins played the piano on this track. Hopkins was a renowned session player who appeared on tracks for The Who, The Rolling Stones, The Beatles and many others. Robert Plant wrote the lyrics, which were a response to critics who claimed their previous album, Led Zeppelin III, wasn't really rock and roll. Led Zeppelin III had more of an acoustic, folk sound, and Plant wanted to prove they could still rock out.