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Illustration of a Russet-bellied Spinetail (Synallaxis zimmeri) egg, 20.3 × 15.4 mm
Illustration © 2026 Lincoln Savi, Savi Made. Free to use with credit.

Synallaxis zimmeri

  • 20.3 × 15.4 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 Peru

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: Synallaxis albescens, Synallaxis azarae, Synallaxis brachyura, Synallaxis castanea, Synallaxis cinerascens ….
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).

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