How do birds live in the airport without water?

I see birds in the airport all the time, they can get scraps of food, but what about water?

Rain ?

Brids are not that smart - some are - but most of what they know they learn by watching other birds do it.Easy answer - they are licking condensation off the exposed airconditioning lines that cool the airport lobby and ticket areas. Those pipes are very cold, and, attract moisture just like a cold beer or glass of water does outside on a hot day.In the winter they would have no problems licking water off any exposed windows - the mositure would come in on people's boots and it will stick to the cold window sills.(Can you tell I have installed the cameras in two big international airports?) LOL.