Antique copper lighting maybe ?

[cprice7369]

About 18 " copper with a brass fitting stamped peacock .

Any ideas what this was ? 

Thank you

[all_fakes]

Looks like a horn, for a vehicle.   Originally  had a rubber bulb to honk.

Have you tried blowing in the small end?

See https://www.collectorsweekly.com/stories/77738-antique-peacock-car-horn