Trumpeter swan The tundra swan ("C. columbianus") more closely resembles the trumpeter, but is significantly smaller. The neck of a male trumpeter may be twice as long as the neck of a tundra swan. The tundra swan can be further distinguished by its yellow lores. However, some trumpeter swans have yellow lores; many of these individuals appear to be leucistic and have paler legs than typical trumpeters. Distinguishing tundra and trumpeter swans from a distance (when size is harder to gauge) can be challenging without direct comparison but it is possible thanks to the trumpeter's obviously longer neck (the great length of
Dark-winged trumpeter species: "P. viridis" between the Madeira and Tapajós rivers, "P. dextralis" between the Tapajós and Tocantins rivers, and "P. obscura" east of the Tocantins. The taxon "dextralis" can potentially be split further, with "interjecta" between Tocantins and Xingu, and "true" "dextralis" for the population between the Tapajós and Xingu. Dark-winged trumpeter The dark-winged trumpeter ("Psophia viridis") is a species of bird in the family Psophiidae. It is found in the Amazon rainforest of Brazil, but only south of the Amazon River and east of the Madeira River. The eastern range of dark-winged trumpeter extends into the lower adjacent Tocantins River