Largest hummingbird in the world, with its size compensating for rather drab plumage; no similar species. Plumage is drab greenish above with a big whitish rump patch and dingy below with variable rusty tones and dusky spotting. Favors rather open and dry habitats from matorral and gardens to Andean scrub; often perches conspicuously atop bushes or on roadside wires. Flight is “slow” with powerful wingbeats, often hovering in jerky manner and chasing insects. Loud sharp calls can draw attention.