Assertion: wren's tip | /r/HasProperty | pale
Facets:
Source sentences:
text: The bush wren (considered extinct since 1972) was very similar to rock wren but was darker underneath (contrasting with a paler chin), and lacked pale tips to the secondaries.
text: Rock wren also has pale tips to the secondary feathers, forming a row of pale spots on lower back when perched (lacking in bush wren).