The bright lights of big cities could be causing an evolutionary adaptation for smaller eyes in some birds, a new study indicates. Adult male Northern Cardinal (Cardinalis cardinalis), is a species ...

Though typically considered benign, recreational trails have the potential to both alter vegetation and disturb birds in ways that might in uence parental nest attendance rates and other behaviors ...

The presence of recreational trails can impact breeding birds either indirectly by altering habitat or the movement patterns of predators or directly if the presence of humans disturbs birds. We ...

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Each year, as the warm weather rolls around, migratory birds like robins (Turdus migratorius) and cardinals (Cardinalis cardinalis) stake out their territories in our neighborhoods. These nesting ...

No, this bird didn’t dye its feathers. The half-red, half-white plumage of this northern cardinal (Cardinalis cardinalis) is the result of gynandromorphy. In other words its sex chromosomes did not ...

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