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Psophia

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The genus Psophia contains a group of birds known as trumpeters. These birds live only in the humid forests of South America. They inhabit the Amazon and the Guiana Shield. Trumpeters are the only members of the family Psophiidae. They are named for the loud calls made by males. These calls sound like trumpeting or cackling sounds. This noise serves as a threat call to others.

Physically, trumpeters resemble large, long-legged chickens. They have a rotund body shape. Their necks are long and flexible. Their legs are also quite long. They possess downward-curving bills. Their heads are small in comparison to their bodies. However, their eyes are relatively large. This gives them an inquisitive or good-natured appearance. Their plumage is soft and feels like velvet or fur on the head and neck. Most of their feathers are black. They often show iridescence in shades of purple, green, or bronze. This shimmer is especially visible on the lower neck and wing coverts.

Trumpeters have unique ways of moving through their environment. They are weak flyers and find flying difficult. They often fly into trees at night to roost above the ground. Instead of flying, they prefer to run on the forest floor. They are very fast runners and can easily outrun dogs. These birds are also capable of swimming across rivers. Most of their day is spent in large, noisy flocks. These groups can sometimes include more than 100 birds. They forage for food on the ground, specifically eating fallen fruit. They often eat fruit that monkeys have knocked down from trees. They also consume arthropods like flies and ants. Some trumpeters even eat small reptiles and amphibians.

The history of classifying these birds is quite complex. The Swedish naturalist Carl Linnaeus introduced the genus Psophia in 1758. He described it in the tenth edition of his work, Systema Naturae. Initially, he recognized only one species, the grey-winged trumpeter, known as Psophia crepitans. The name Psophia comes from the Ancient Greek word psophos. This word means "noise." Since Linnaeus's time, the taxonomy of the genus has remained unsettled. Different scientific systems now recognize different numbers of species.

Different taxonomic authorities provide different counts for the species in this genus. The International Ornithological Committee is the most conservative group. They recognize only three species. These are the grey-winged trumpeter, the pale-winged trumpeter, and the dark-winged trumpeter. The grey-winged trumpeter includes three subspecies: P. c. crepitans, P. c. napensis, and P. c. ochroptera. The pale-winged trumpeter is Psophia leucoptera. The dark-winged trumpeter is Psophia viridis.

Other systems, such as the Clements taxonomy, provide different splits. The Clements system recognizes the pale-winged trumpeter subspecies differently. It also provides English names for these subspecies. Meanwhile, the BirdLife International (HBW) system is more expansive. HBW recognizes six different species within the genus. These include the grey-winged, ochre-winged, white-winged, green-winged, olive-winged, and black-winged trumpeters. A 2010 review of phylogeny and biogeography even suggested there could be as many as eight species. This shows how scientific understanding changes with new research.

Trumpeters also have a documented relationship with humans. Because they become tame easily, people sometimes use them as "guard dogs." They are very loud when they feel alarmed. Some sources claim they are excellent at killing snakes. The nineteenth-century botanist Richard Spruce wrote about this skill. He described a tame grey-winged trumpeter that was very friendly and good at hunting snakes. Spruce even suggested that England should import these birds to India. However, other sources note that this snake-killing ability is only reputed.

Reproduction for trumpeters involves specific nesting habits. They build their nests in holes within trees. They may also nest in the crowns of palm trees. A female lays between two and five eggs. These eggs have white, rough shells. The average size of an egg is not specified, but they are part of a careful process. In the grey-winged and pale-winged species, groups of adults care for a single clutch of eggs. This social behavior helps ensure the survival of the young in the dense forest.

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