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Illustration of a Blue-mantled Thornbill (Chalcostigma stanleyi) egg, 13.5 × 8.9 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Chalcostigma stanleyi

  • 13.5 × 8.9 mm (estimated)
  • Speculative: we haven't found documented measurements of this egg yet, so we estimated its size from related birds.
  • Clutch: 2 eggs
Breeds in Bolivia, Colombia, Ecuador, Peru

Plain white, unmarked.

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same family: Adelomyia melanogenys, Amazilia tzacatl, Amazilia yucatanensis, Anthracothorax dominicus, Anthracothorax mango ….
Description
Wikipedia, 'Blue-mantled thornbill' (summarising Birds of the World account), accessed 2026-10.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

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