This adult female black face zebra finch is asymmetrical . The left side of the face lacks the black "smudge" of the "eye drop" black line. She and her black face mate have produced 37 young (including 18 males) so far in 19 months. None have been noted with such asymmetry. This rather indifferent record is offset by my having been absent part of the time, and their last clutch (Feb 02) consisted of 2 males and 4 females successfully raised.
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