is the smallest heron bird living in the wild in the Czech Republic. In terms of size, it compares to the Collared Dove, though it is different in color – the male bird has a black crest, and the female bird has one with brown spots. This migratory bird leads an extremely hidden life in reed bed and willow undergrowth; its presence is most easily determined by identifying its call. It feeds on insects, spiders, mollusks, fish, or frogs. Most of them live in the Elbe valley, South Bohemia, or South and North Moravia. The species is critically endangered in the Czech Republic.