Haverly's United Mastodon Minstrels walkers, and minstrels in elephant costumes. Haverly's United Mastodon Minstrels saw great success, and the impact on minstrelsy was profound. Other troupe owners rushed to compete, mimicking the Mastodons' elaborate sets and large number of players. Ultimately, many smaller companies folded or were forced to travel further from the established minstrel circuits in order to survive. Haverly's United Mastodon Minstrels Haverly's United Mastodon Minstrels was a blackface minstrel troupe created in 1877, when J. H. Haverly merged four of the companies he owned and managed. Borrowing techniques from showmen like P. T. Barnum, Haverly advertised the Mastodons in broadsides, newspapers,
Mastodon and expanded to relatively large numbers 13,000 years ago, and their hunting may have caused a gradual attrition of the mastodon population. Analysis of tusks of mastodons from the American Great Lakes region over a span of several thousand years prior to their extinction in the area shows a trend of declining age at maturation; this is contrary to what one would expect if they were experiencing stresses from an unfavorable environment, but is consistent with a reduction in intraspecific competition that would result from a population being reduced by human hunting. Mastodon Mastodons (Greek: μαστός "breast" and ὀδούς, "tooth")