[tn-bird] Egg comparisons


A cardinal has built a nest in a cedar tree in our yard.  So far, there are 2 
eggs.  Both eggs look remarkably similar to a cowbird egg that we confiscated 
from a prothonotary warbler nest earlier in the season.  Short of DNA 
profiling, is there any way to tell the eggs of the two species apart?

Van Harris
Millington, TN

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