I have a large plant saucer on the patio right outside our French doors for the tortoise to drink from when she needs to. Yes, tortoises do need to drink as well, contrary to what most people think! It is big enough for her to climb into and wallow around and fairly deep as tortoises have to submerge their whole head in order to drink.
On several mornings recently a magpie has used the saucer for a good old splash around, even though we have a bird bath further down the garden which is filled with fresh water daily. It is lovely to see him (or her) when I am having my morning tea inside at the table!
The bird bath is used by lots of birds daily too. Tits, finches and the lovely robins appreciate a cooling drink in this hot weather.