Appearance
The grey-winged trumpeter is a dumpy, guineafowl-like bird with a long neck and legs, and short yellow chicken-like bill. It is 48–56 centimetres long and 1.3 kilograms in weight. The soft plumage is mainly black, but the feathers of the inner wing are grey.Naming
It has two subspecies separated by the Rio Negro: The nominate from the Guiana Shield, and ''napensis'' from the north-western Amazon. Although their plumage differences are relatively minor, some have suggested they should be treated as separate species due to genetic differences. Genetic evidence also suggests ''ochroptera'', traditionally considered a subspecies of the pale-winged trumpeter, actually is closer to the grey-winged trumpeter.Behavior
The grey-winged trumpeter's song is a low humming, but its call, as its name suggests, is a very loud ''JEEK'' or honking ''TZAAK''.Reproduction
These are gregarious forest birds which nest in hollow trees, laying 3-4 white eggs that are incubated by all members of a group of five or more birds. When not breeding, the flocks may number 50 or more. Their food is insects and fruit, picked off the ground. They are weak fliers, and will run by preference.References:
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