In North America,many kinds of birds have closely related eastern and western counterparts species or subspecies that sometimes produce hybrid offspring where their ranges overlap.For example,Baltimore and Bullock's orioles have been known to produce hybrid offspring in Nebraska,as do yellow- shafted and
red- shafted flickers.Describe how you would determine whether the counterparts are two separate species or are just two subspecies within a single species.

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The Answer of In North America,many kinds of birds have closely related eastern and western counterparts species or subspecies that sometimes produce hybrid offspring where their ranges overlap.For example,Baltimore and Bullock's orioles have been known to produce hybrid offspring in Nebraska,as do yellow- shafted and
red- shafted flickers.Describe how you would determine whether the counterparts are two separate species or are just two subspecies within a single species.

In North America,many Kinds of Birds Have Closely Related Eastern