A stone with a natural depression, with a dripping hose
channeled through a piece of bamboo for esthetics.
Constant dripping keep water fresh, discourages mosquito
growth and insures a patina of moss on the stone. The sound of
dripping water attracts birds to the bath.
An old birdbath with patina has dripping water from a vintage brass
faucet shaped like a quail, supplied by a hidden hose.
Overflow from the birdbath drips into a stone with a natural
depression for the use of smaller birds.
When winter comes with danger of freezes, I disconnect the hoses and carry water to the birdbaths in a bucket. Usually in late February I have to re-connect the hoses when migrating Robins arrive and line up for a drink and a quick bath.
I'm linking to the Birdbath Party at Funky Junk Interiors blog.
My first birdbath was a garbage can lid on a concrete block. Dripping water was provided by a milk jug with a pinhole in the bottom, suspended overhead. Brown thrashers were among the visitors, usually shy about water and ground feeders never visiting a tall birdbath.