This Swainson's hawk has been terrorizing letter carriers in Moose Jaw since late May. This Swainson's hawk has been terrorizing letter carriers in Moose Jaw since late May. (CBC)

Canada Post has temporarily suspended door-to-door mail delivery for a neighbourhood in Moose Jaw, Sask., because of threatening swoops from a protective bird of prey.

Letter carriers had recently become the target of a Swainson's hawk nesting in the area. The common prairie hawk, which can grow to 50 centimetres in length and weigh up to 1.1 kilograms, is known to be quite territorial when caring for young.

The fierce moves of the Moose Jaw bird have disrupted mail delivery since late May.

"What they do is just try to intimidate you," Janet Ng, a bird expert from the Saskatchewan Burrowing Owl Interpretive Centre, told CBC News on Friday.

Janet Ng, a bird expert from the Saskatchewan Burrowing Owl Interpretive Centre, says the hawk is merely protecting its young. Janet Ng, a bird expert from the Saskatchewan Burrowing Owl Interpretive Centre, says the hawk is merely protecting its young. (CBC)

"They're trying to protect their nests. They want to protect their young, and they want to scare you off because they don't know what your intentions are."

Canada Post said mail delivery will resume as soon as the birds have moved on.

The Moose Jaw Times Herald reported Thursday that its paper carriers were still delivering to the neighbourhood, but residents were picking up mail at a nearby post office.