Which seeds are identified as classic examples of filler ingredients commonly found in inexpensive mixes that House Finches generally pass over?

Answer

Milo and cracked corn

Milo is specifically named as a seed often present in cheap mixes that finches rarely consume, choosing to ignore the hopper feeder containing it.

Which seeds are identified as classic examples of filler ingredients commonly found in inexpensive mixes that House Finches generally pass over?
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