118 ORNITHOLOGISTS' COMPENDIUM. 
z. 
Zone (L. zo'nus), n. A broad band of color, completely encircling the 
circumference of a body. 
Zoological, a. Pertaining to zoology. 
Zool'ogy, n. The natural history of animals in general. 
Zygodac'tylae (L.), n. A group of zygodactyle birds comprising the 
families Rhamphastidce (Toucans), Capitonidce (Barbets), Bucconidce 
(Puff-birds), and Galbulidce (Jacamars). In obsolete systems the 
group was much more extensive, embracing all yoke-footed birds, 
which are now divided in several distinct groups, e. g., the Pici (Wood- 
peckers and Wrynecks), Anisodactylce (Motmots, Todies, Kingfishers, 
etc.), and Coccyges (Cuckoos and Plaintain-eaters.) 
Zygodac'tyle (L. zygodac'tylus), a. Yoke-toed, or with the toes in pairs, 
two before and two behind, as in the Woodpeckers, Parrots, etc. Per- 
taining to the Zygodactyly. 
