. The birds of the Republic of Panama. Birds. FAMILY THRAUPIDAE 441 Adult female, head and throat dark brown; upper back dark brownish red, brightest on upper tail coverts; wings and tail blackish brown; rest of undersurface light brownish red. Immature, like female, but duller.. Figure 35.—Crimson-backed Tanager, Sangretoro Comim, Ramphocelus dimi- diatus, male (above), female (below). The Crimson-backed Tanager is widespread and common in the low- lands (except in continuously forested areas) and in partially cleared areas in foothills of both slopes of Panama. It is more abundant on the Pac
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. The birds of the Republic of Panama. Birds. FAMILY THRAUPIDAE 441 Adult female, head and throat dark brown; upper back dark brownish red, brightest on upper tail coverts; wings and tail blackish brown; rest of undersurface light brownish red. Immature, like female, but duller.. Figure 35.—Crimson-backed Tanager, Sangretoro Comim, Ramphocelus dimi- diatus, male (above), female (below). The Crimson-backed Tanager is widespread and common in the low- lands (except in continuously forested areas) and in partially cleared areas in foothills of both slopes of Panama. It is more abundant on the Pacific slope, and on the Caribbean side is absent from Bocas del Toro. A separate race is found in the islands of the Pearl Archipelago, and another on Isla Coiba, off the Pacific coast of Veraguas. In the past, populations from mainland Panama have been divided among three races: nominate dimidiatus, supposedly in Darien, albirostris (—palli- dirostris Hellmayr) of Chiriqui, and isthmicus in between. In the large series now available at the Smithsonian, it is evident that age and indi- vidual variation account for the differences previously attributed to geography. Herein all the birds of mainland Panama are referred to the nominate form, which ranges to Colombia and western Venezuela. Similarly, it also appears that the race molochinus (de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, vol. 102, 1950, p. 136) of the upper Magdalena Valley of Colombia may be indistinguishable from the nominate form. This species inhabits forest edge, shrubby areas, clearings, and gar- dens; at Balboa, Canal Zone, I have seen several feeding at a ripe mango on the ground and coming to drink at a dripping faucet. In the wild, especially in the islands, they are shyer and more likely to be found in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resem