Why This Owl Raised A Duckling As Its Own
Concerned that the predatory owl might eat the wood duck chick, Wolf contacted a raptor expert, who confirmed the duckling might be in danger. In that case, the female owl was actually able to incubate and hatch three wood duck chicks, says Artuso, who published the findings in 2007 in the Wilson Journal of Ornithology. After all, wood duck eggs are not only more oblong in shape than owl eggs, they’re also about twice the volume.
Source: www.nationalgeographic.com