A stork's nest is huge - bigger than a bathtub. Storks build them on the highest spots they can find: chimneys, telephone poles, old church towers. Some Polish farmers even put up special cartwheels on top of poles to make a flat base, so storks will pick their farm to nest on. Having a stork's nest on your house is considered very lucky.
Storks fly an incredible journey twice a year. In autumn, they leave Poland and fly more than 10,000 kilometres south to Africa, gliding on warm air. In spring they come all the way back to the exact same nest. Year after year, the same stork pair returns - they remember the way.
Storks have no song. Instead they say hello to each other by clattering their long beaks together very fast, making a noise like fast clapping. When two storks meet at their nest, they throw their heads back and clack their beaks in a kind of greeting dance.
Polish villages welcome the storks. In some places, when the first stork returns each spring, the village rings a bell. They eat frogs, mice, fish and worms - so they keep the fields tidy of pests. They are also one of the most photographed birds in Poland: it's hard not to point your phone at a giant bird standing on top of a house.