Among songbirds, a "crystallized" song is one that A) is beyond the range of hum

Author Question: Among songbirds, a "crystallized" song is one that A) is beyond the range of hum (Read 591 times)

strangeaffliction

Hero Member
Posts: 660

on: Oct 26, 2013

Among songbirds, a "crystallized" song is one that
A) is beyond the range of human hearing.
B) is perfected by juveniles.
C) extremely young chicks sing.
D) is a perfected species-specific song.
E) warns of predators.

Celeste

Hero Member
Posts: 588

Reply #1 on: May 30, 2019

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