Biatas nigropectus
- 22 × 16.2 mm (estimated)
- Speculative: we haven't found a description of this egg (a source we checked reports it as undescribed), so we estimated its colours and markings and its size from related birds.
Breeds in Argentina, Brazil
No documented description found yet; drawn like the Barred Antshrike egg (same family).
Sources of information
- Size
- Estimated, no measurements found: the median length and width of measured eggs of the same family: Akletos melanoceps, Batara cinerea, Cercomacra nigricans, Cercomacroides tyrannina, Cymbilaimus lineatus ….
- Description
- Wikipedia species account (summarising Birds of the World / Zimmer & Isler accounts), accessed 2026 (says the egg has not been described).
- 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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