BIODIVERSITY

These feisty little birds are among our tiniest, much the size of a hummingbird; but their voices (widget-jooo widget-joo joo joo) are among the loudest, high in the oaks in the spring as they court and defend their nests.

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For videos of gnatcatchers bringing food to their nest in an oak tree--and to a loudly begging brown-headed cowbird fledgling (which they have been fooled into raising as their own--an example of brood parasitism), please see here.