What specialized physical feature, similar to owls, does the Northern Harrier possess to aid in hunting?
Answer
A facial disc or ruff of feathers
Harriers possess a ruff of feathers around their face, known as a facial disc, which helps direct sound to their ears, pointing toward specialization in hunting by sound and sight close to the ground.

Related Questions
To which taxonomic family does the Northern Harrier belong?What term is commonly used to describe the Northern Harrier's low, deliberate flight pattern?What specialized physical feature, similar to owls, does the Northern Harrier possess to aid in hunting?What nickname is given to the adult male Northern Harrier due to its plumage?How does the Northern Harrier's wing beat differ from the typical flight of falcons or soaring hawks?What is the scientific name for the North American species of Northern Harrier?What highly reliable visual marker, visible in flight, helps identify a harrier regardless of its overall plumage color?What type of prey do Northern Harriers primarily search for by quartering grasslands and marshes?In contrast to the harrier's hunting style, what method do falcons often use to secure prey?What distinction sets the Northern Harrier's physical build apart from bulkier Buteos?