My guess was an ornament in the shape of the Australian relative of the Jack-alope of the western U.S.Ahhhhh.... We call them Deer Whistles in the US. .
"Loud pipes save lives." Or so the T-shirt says. I always think of this at times I happen to be next to a Harley with noisy aftermarket pipes at a stoplight. With my windows up and radio on I can barely hear the bike when it is rumbling only 6 ft. from my ear. It's a bit louder as it pulls away, but I only notice the sound because I pay attention to bikes. If I didn't, it would be just as easy to pull out in front of a noisy bike as a quiet one.I use a Goldie silencer in the hopes of warning off car drivers althought it probably doesn't have the same forward projection.