Sterntaucher vs Rotkehl-Nektarvogel

The Red-throated Diver (Gavia stellata) and the Red-throated Sunbird (Anthreptes rhodolaemus) are easily distinguished by their habitats and plumage. The Diver is a waterbird with plain gray plumage and a distinctive red throat patch, while the Sunbird is a small, colorful passerine more typical of tropical environments.

Look for the Diver in coastal or lake environments, especially in colder regions, and note its plain gray plumage with a red throat. The Sunbird will be found in tropical areas, likely with more colorful plumage.

The Red-throated Diver is significantly larger, being a waterbird, compared to the small Red-throated Sunbird.

The Red-throated Diver has relatively plain gray plumage with a red throat patch. The Sunbird, typically, would have more vibrant and varied plumage, characteristic of sunbirds.

The Diver is a central-place forager, flying between breeding and foraging areas, while the Sunbird's behavior would be more typical of passerines, likely involving nectar feeding.

The Diver breeds in arctic and boreal lakes and winters along coasts, while the Sunbird is likely found in tropical environments, such as forests.

The Diver's call is described as cacophonous, contrasting with the likely more melodic calls of a sunbird.