I don't know any songs about mastodons.
@JeffMelnick Not mastodons precisely, but there's Primus's "Southbound Pachyderm."
@JeffMelnick you made me go down this search rabbit hole, *you*… and where so I end up?
https://www.revolvermag.com/music/fan-poll-top-5-mastodon-songs
Fan Poll: Top 5 Mastodon Songs

See what prog-metal epic came in at No. 1

Revolver

@JeffMelnick The lines from Joni Mitchell’s “Blue Motel Room”:

“I know that you've got all those pretty girls coming on
Hanging on your boom-boom-pachyderm

Will you tell those girls that you've got German Measles
Honey, tell them you've got germs”

@JeffMelnick Well, there is the band Mastodon.