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.
The most successful of these was the 2007 Ahmet Ertegun Tribute Concert in London, with Jason Bonham taking his late father's place behind the drums. Led Zeppelin are widely considered one of the most successful, innovative, and influential rock groups in history. They are one of the best-selling music artists in the history of audio recording; various sources estimate the group's record sales at 200 to 300 million units worldwide.