Summary

Portrait of James Paul Chapin James Paul Chapin Descriptions of Three New Birds from the Belgian Congo

The adult male of A. minus is distinguished by the bluer hue of the forehead, throat, and upper breast, which show in certain lights deep violet reflections, and by the more scarlet, less crimson color of the remaining underparts. In life the naked areas on the cheeks are bright yellow, whereas in A. narina they are light green.
The adult female differs in the more tawny or ochraceous coloration of the breast, which is grayish in this sex of A. narina, although sometimes washed with light brown on the upper breast. A greenish gloss on the upper breast is more common in females of A. narina.
Source: Gutenberg

Portrait of James Paul Chapin James Paul Chapin Descriptions of Three New Birds from the Belgian Congo

An immature male has the green of the upper breast broken by irregular bars of cinnamon. The lower breast is cinnamon mixed with rose, and barred at the sides with green, and shades to light scarlet-red on belly and under tail-coverts. The greater wing-coverts and three inner secondaries bear each a large spot of light ochraceous buff, extending across the whole width of the innermost secondary, and most of the secondaries are vermiculated or speckled on their outer webs with buff.
Source: Gutenberg

Portrait of James Paul Chapin James Paul Chapin Descriptions of Three New Birds from the Belgian Congo

Ear coverts drab, bordered with fuscous-black; feathers of throat pale smoke-gray, margined with fuscous, those of upper breast similar, but heavily bordered with fuscous-black, consequently with a very pronounced "scaly" appearance; lower breast growing darker, so that the dark borders are less conspicuous, and the feathering of the belly completely fuscous-black with slight oily gloss. Under wing coverts mouse-gray with darker edges, flanks and under tail-coverts black with slight greenish gloss.
Source: Gutenberg

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