Endangered owls, cared for at the Calgary Zoo, now returned to the wild

Endangered owls, cared for at the Calgary Zoo, now returned to the wild

Workers with the Wilder Institute/Calgary Zoo will be monitoring the lives of 20 burrowing owls in the wild over the next while to make sure they thrive. (Supplied) Workers with the Wilder Institute/Calgary Zoo will be monitoring the lives of 20 burrowing owls in the wild over the next while to make sure they thrive. (Supplied)

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