Like other species of howler monkeys, almost all mantled howlers have full three color vision. Shaped to represent different animals like howler monkeys, predatory cats, birds, coyotes, or Aztec deities. Howler monkeys are widely considered to be the loudest land animal. The mantled howler is diurnal and arboreal. The Guatemalan black howler is diurnal and arboreal. However, the mantled howler is a relatively inactive monkey. Ren "et al." identified a variant further, Phe2-OT in howler monkeys. Clearly recognizable are the figures of Hunahpu, Xbalanque, and the howler monkey scribes and sculptors. The "Ozark Howler" a large cougar like animal. The bears were named Grizzler, Howler, Fang, and Gums. The Guatemalan black howler has the largest males, which average over . He also provided the voice for the cartoon character Howler in Hanna Barbera's "Pound Puppies". Only two employees remain&colon; the aged Junior Postman Tolliver Groat and his assistant Stanley Howler. Ray is notable for combining an Indian harmonium with a "big-voiced blues-rock howler" vocal approach. It also includes the Frontier Flyers, The Howler, Mini Scrambler, Livery Stables, and Red Baron.