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Illustration of a Mouse-colored Thistletail (Asthenes griseomurina) egg, 22.5 × 16.5 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Asthenes griseomurina

  • 22.5 × 16.5 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 Ecuador, Peru

No documented description found yet; drawn like the Rusty-vented Canastero egg (same genus).

Sources of information

Size
Estimated, no measurements found: the median length and width of measured eggs of the same genus: Asthenes anthoides, Asthenes baeri, Asthenes dorbignyi, Asthenes flammulata, Asthenes hudsoni ….
Description
Greeney, H.F. 2020. The nest, egg, and nestling of Many-striped Canastero Asthenes f. flammulata. Revista Ecuatoriana de Ornitologia 6: 67-75 (lists this species among 14 Asthenes lacking nest descriptions) (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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