Mastodon group consisted of adult females and young, living in bonded groups called mixed herds. The males abandoned the mixed herds once reaching sexual maturity and lived either alone or in male bond groupings. As in modern elephants, there probably was no seasonal synchrony of mating activity, with both males and females seeking out each other for mating when sexually active. Mastodons have been characterized as predominantly browsing animals. Most accounts of gut contents have identified coniferous twigs as the dominant element in their diet. Other accounts (Burning tree mastodon) have reported no coniferous content and suggest selective feeding on low,
Mastodon (band) on the "Adult Swim Presents" tour along with Converge and High on Fire. On October 17, 2009, they recorded a DVD documenting the tour at the Aragon Ballroom in Chicago. Mastodon played the alternative music festival Big Day Out, touring across Australia and New Zealand in January and February 2010. On October 29, 2009, they performed "Divinations" on "Late Night with Jimmy Fallon". On November 4, 2009, Mastodon released their second EP, entitled "Oblivion". Teaming up with bands Deftones and Alice in Chains, Mastodon went on tour in September 2010 in the United States and Canada. The tour was called