To distinguish one bird from a similar one, watch how the bird moves. Does it flick its wings? Bob up and down? Flip its tail? The White-breasted Nuthatch (right) works its way down the trunk of a tree, while the Brown Creeper works its way up. A field guide usually mentions these behaviors, and watching for them can help you determine which bird is which. It's like detective work: gather enough clues, and you'll solve the mystery!

More info and transcript at BirdNote.org. 

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