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Biology, 02.06.2020 23:00 SkyThefly

What is the speculum on waterfowl?
1.Differences in bill coloration
2.Bright-colored patch on the secondaries of diving ducks
3.Bright-colored patch on the secondaries of dabbling ducks
4.Range of colors waterfowl can exhibit

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What is the speculum on waterfowl?
1.Differences in bill coloration
2.Bright-colored pat...
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