Assertion: wagtail | /r/HasProperty | small to push the intruding egg
Facets:
Source sentences:
text: Moksnes et al. theorised that this occurs because the wagtail is too small to push the intruding egg out of the nest, and too short-billed to destroy the egg by puncturing it.
text: Scientists theorise that this occurs because the wagtail is too small to push the intruding egg out of the nest, and too short-billed to destroy the egg by puncturing it.