Assertion: osprey's feather | /r/HasProperty | lost by the time
Facets:
Source sentences:
text: Juveniles of this species are similar to adults, except for the orange-red color of their irises in their first years, and a scaly appearance of the back and wing coverts, an appearance that is due to the light buff-colored edges of their first feathers, which are lost by the time they see their first winter.