are leaf-eating birds with elaborate foregut fermentation (18) (Figure 13a).
But hoatzins have an unusually big crop (food-storage pouch) and esophagus (tube leading from the mouth to the stomach), explains Alejandro Grajal, an ornithologist (bird scientist).
Hoatzins have leaves all around them in their lush, tropical habitat.
Since describing the bird, Opisthocomos hoazin, in 1776, ornithologists have had problems pinpointing its closest kin, as the hoatzin looks and acts so unlike other birds.
They found that hoatzin DNA most closely resembles cuckoo DNA.
While performing autopsy studies on the red-eyed, foul-smelling jungle birds in their native Venezuela, Rodriguez discovered that the adult hoatzin
harbors remarkably few parasites or disease-causing bacteria.
Strahl discovered that the hoatzin (Opisthocomus hoazin) is the only bird known to digest food in the same way as cows, sheep and other ruminants--using bacteria to break down fibrous plant material in a special foregut chamber above its stomach.
With flying not an option, Grajal says, a baby hoatzin pursued by predators must use other traits to escape, such as its agility underwater and its clawed wingtips, which enable the chick to clamber up trees like a monkey.
Pages 444-487 in Handbook of the birds of the world, Volume 3, Hoatzin
to Auks (J.
The Forest guild (four species) included Hoatzin
(Opisthocomus hoazin), Grey-necked Wood Rail (Aramides cajanea), Sunbittern (Eurypyga helias), and Horned Screamer (Anhima cornuta).
deiroleucus Chachalacas/Curassows/Guans Cracidae Speckled Chachalaca Ortalis guttata Spix's Guan Penelope jacquacu Common Piping Guan Pipile pipile Sickle-winged Guan Chamaepetes goudotii Nocturnal Curassow Nothocrax urumutum Salvin's Curassow Mitu salvini New World Quail Odontophoridae Starred Wood Quail Odontophorus stellatus Hoatzin
Opisthocomus hoazin Limpkin Aramidae Limpkin Aramus guarauna Rails/Crakes/Coots Rallidae Chestnut-headed Crake Anurolimnas castaneiceps Rufous-sided Crake Laterallus melanophaius Grey-breasted Crake L.
One animal they were eager to see was the hoatzin
, which is a "punk-rock looking bird," he said, because of its mohawk.
bandores banjoist Brahmins broadens confuted habitude halutzim hedonist hoatzins
hordeins joinders pibrochs spheroid
Narrow channels are filled with the sounds of a crowd of whistling sun bitterns and ducks and of hoatzins
, a partridge-like bird, sheltered in overhanging branches, while darting spectacled caymans and shad splash ahead of the penero.
Seuss, turkey-like, claw-winged hoatzins
vie for attention with azure gallinules; macaws, parrots, and troupials call out overhead.