White Stork is very popular bird in Poland. Over 23% of world population (52,000 pairs) of this bird live here in Spring and Summer. Storks are wandering birds and just before Winter they fly away to hotter countries in Africa.

Author: Richard Bartz under:Creative Commons Attribution-Share Alike 2.5 Generic

Storks are hudge birds. They have near 200 cm (79 in) wingspan and weight about 4 kg. They are very useful. because they feed with small field pests like mouses, voles and moles. Storks eat also small snakes, lizards, frogs and even small rabbits.

Walking stork

Storks made strong and durable nests (in Poland mainly on electric poles). where they comming back every year. There are known nests which are used for 400 years!!

Author: Bogdan Giuşcă under (Multi-license with GFDL and Creative Commons CC-BY 2.5)

In Poland storks are deeply rooted in the culture. In the old religion it was believed, that stork takes souls to the paradise (Wyraj). Generally storks were believed to be birds which brings luck. Today Poles says, that storks bring children.
Storks were often motives in creations of Polish artists. For example Cyprian Kamil Norwid. Here is part of his poem "My Song" (translation taken from wikipedia):