In Poland, a female stork throws one of its young out of the nest. Unfortunately, the baby did not survive the fall. This behavior occurs often enough to storks and other birds. The stork kills the weakest of the litter when it can not provide enough food for all, or when a bird behaves abnormally, shows signs of illness, disability or weakness. The instinct commands parents to eliminate “suspected” bird from the nest so as not to endanger other healthy chicks.