Monograph of the Trochilidae, or family of hummingbirds: Part III
Primary tabs
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- Black-hooded Sunbeam plate 181
- Plate depicting: Aglaeactis pamela (Orbigny, 1838) -- Black-hooded Sunbeam
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- Bearded Helmetcrest plate 182
- Plate depicting: Oxypogon guerinii (Boissonneau, 1840) -- Bearded Helmetcrest