How to Identify Purple-rumped Sunbird Feathers

What Purple-rumped Sunbird's Feathers Look Like

This is one of the smallest birds you're likely to find a feather from, and every feather is correspondingly tiny:

• Rump feathers: the diagnostic feature — a small, brilliant, iridescent violet-purple patch just above the tail base on adult males, visible even as a single loose feather in good light.
• Back and crown feathers (male): deep maroon to purplish-brown with a metallic sheen, especially on the crown and mantle.
• Throat feathers (male): dark maroon-red, iridescent, bordered below by a narrow iridescent blue-green band across the upper breast.
• Underparts feathers: bright yellow on the belly, contrasting sharply with the darker throat.
• Female feathers: much plainer — olive-brown above, pale yellowish below, with no iridescence and no purple rump patch, making female feathers much harder to pin to species.
• Size: even the largest contour feathers rarely exceed 2 cm; flight feathers are minute, under 4 cm, and delicate.

Step-by-Step: Is This Feather From a Purple-rumped Sunbird?

1. Check the scale first. If the feather is smaller than a fingernail, you're in the right size range for any sunbird — this immediately rules out most other perching birds.
2. Look for a violet iridescent patch. A tiny feather that flashes purple-violet in the light, rather than plain brown, strongly suggests the rump of a male Purple-rumped Sunbird.
3. Check for a maroon throat with a blue-green band beneath it. This two-tone throat pattern is distinctive among sunbirds in its range.
4. Note the yellow belly. Bright lemon-yellow underparts paired with a dark, glossy throat is a strong combination pointing to this species.
5. Consider female/juvenile options. A plain olive-and-yellow feather with no shine could be a female or juvenile of this or a related sunbird species, and cannot be confirmed to species by color alone.

Similar Species & How to Tell Them Apart

• Purple Sunbird: Males are almost entirely iridescent blue-black to purple-black over the whole body (in breeding plumage), lacking the Purple-rumped's contrasting maroon-and-yellow combination.
• Loten's Sunbird: Similar maroon throat but with a longer, more curved bill (not a feather trait) and a duller, less contrasting rump; overall the purple rump patch of this species is smaller and less flashy.
• Olive-backed Sunbird: Shows an olive-green back rather than maroon, and its throat is metallic blue-black rather than maroon-red.
• Purple-throated Sunbird: Throat iridescence extends further down the breast, without the sharp yellow-belly contrast seen in Purple-rumped.

Where & When You'll Find Them

Purple-rumped Sunbirds are common garden and scrubland birds across peninsular India and Sri Lanka, often visiting flowering trees and hedges, so feathers are most often found in gardens, temple grounds, and forest edges rather than deep wilderness. Because the species breeds nearly year-round in much of its range with a fairly continuous molt, tiny feathers can turn up under favored feeding perches at almost any time of year, though slightly more often after the main breeding peaks.