Skip to content
Illustration of a Black-throated Thistletail (Asthenes harterti) egg, 22.5 × 16.5 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Asthenes harterti

  • 22.5 × 16.5 mm (estimated)
  • Its colour follows its family (the eggs of all its relatives are alike); we haven't found a description of this species' own egg yet. Speculative: we haven't found documented measurements of this egg yet, so we estimated its size from related birds.
Breeds in Bolivia

Plain white or with a faint greenish-blue tinge, unmarked, as in ovenbird and woodcreeper eggs (we haven't found a description of this species' own egg yet).

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
Schönwetter, M. 1960–1992. Handbuch der Oologie (ed. W. Meise), Lieferung 14. Akademie-Verlag, Berlin., pdf p. 12.
Shape
Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).

Have you seen this egg, or know a description or measurements of it? Message us.