what does this bird sound like?
The songs of the two sexes of the northern cardinal, although not distinguishable by the human ear, are sexually dimorphic.
Northern cardinal
The songs of the two sexes of the northern cardinal, although not distinguishable by the human ear, are sexually dimorphic. 
where do cardinals live in the united states Northern cardinals are numerous across the eastern United States from the southern half of Maine to Minnesota to the Texas-Mexico border
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Northern cardinal [SEP] Song and call
This chipping noise is also used by a cardinal pair to locate each other, especially during dusk hours when visibility wanes. The songs of the two sexes of the northern cardinal, although not distinguishable by the human ear, are sexually dimorphic. It is suggested that this is because of the differences in levels of hormones of the two sexes.