It's a bird...it's a plane...no, it's Mandurah's 'dildo duck’

This is one "duck" that definitely doesn't need to be thrown any bread.

A Mandurah woman's post this week on a popular Perth Facebook page has drawn widespread interest - and no shortage of hilarity - after she thought she'd spotted a "black duck" on a grassed area near a lake.

On closer inspection it turned out to be a large sex toy.

WAtoday is unaware if the woman used the type of abductive reasoning made famous by American poet James Whitcomb Riley to determine it wasn't a duck: "When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck."

But given the presence of other ducks splashing about nearby in the lake, it's easy to see why the initial mistake was made.

One Facebook commenter noted the toy viewed from a distance looked eerily like a well-known picture purported to be of the Loch Ness Monster. (Or was that the C--kness Monster? Sorry, we couldn't resist).

Another posted a photo of a variety of erotic toys left sitting at a bus stop. Perhaps Perth's public transport system is a turn-on after all?