Goldenrod vs. Ragweed
by Glen Mittelhauser
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White Clover vs. Alsike Clover
by Glen Mittelhauser
Large Cranberry vs. Small Cranberry
by Glen Mittelhauser
Membranoptera fabriciana vs. Euthora cristata
by Jordan Chalfant
House Finch vs. Purple Finch
by Logan Parker
Red Pine vs. Eastern White Pine
by Glen Mittelhauser
Great Cormorant vs. Double-crested Cormorant
by Logan Parker
Yellow Pine-sap vs. One-flowered Indian-pipe
by Glen Mittelhauser
Downy Woodpecker vs. Hairy Woodpecker
by Logan Parker
Monostroma grevillei vs. Protomonostroma undulatum
by Jordan Chalfant