ODONTOPHORUS PACHYRHYNCHUS, Tschudi. 
Thick-billed Partridg-e. 
Specific Character. 
“ Odontophoro guyanensi similis, sed differt coloribus prcecipue gastrcei saturatioribus, abdomine 
fasciolis nigris et fuscis vario, pedibus validioribus, digit is longioribus et rostro midto 
altiore .”—Tsch udi. 
General plumage mottled brown and black, which, extending to the abdomen, offers a marked 
difference from the colouring of O. Guianensis : cheeks strongly washed with ferruginous, 
and barred and freckled with brown ; occipital crest-feathers alternately barred with 
black and rufous; chest, hind part of the neck and mantle washed with grey; bill black ; 
feet lead-colour. 
Total length, 11 inches; bill, 1; wing, 5f; tail, 21; tarsi, 11; middle toe and nail, If. 
Odontophorus pachyrhynchus, Tschudi, Fauna Peruana, p. 282.—Gray and Mitch. Gen. of 
Birds, vol. iii. p. 513, Odontophorus, sp. 9- 
For the discovery of this species we are indebted to the researches of M. Tschudi, it being one of the 
novelties which rewarded his explorations of the interior of Peru, where he states it is to be met with in the 
districts ranging between four and seven thousand feet above the level of the sea. It possesses many 
characters in common with 0. Guianensis and 0. marmoratus, but is rendered conspicuously different from 
both by the great size and the thickness of its bill, whence the specific name. 
Habitat. Peru. 
The figures, which are a trifle less than the natural size, were taken from a specimen collected by 
M. Tschudi. 
