The Great Crested Grebe (Podiceps cristatus) is a strictly aquatic species, which can be found especially in the Danube's Delta.
This aquatic bird migrates from Northern Africa, Southern Europe and Southern Asia to the Danube's Delta during early spring.
Its backside is covered with light brown feathers and its belly with bright white feathers. Its feathers are thick and waterproof.

The Great Crested Grebe feeds on little fish, insects, little crabs and aquatic larvae.
During pairing season, both male and female communicate using a brown feather collar, embellished with formations which have a communicative role, located on their necks.

The nuptial games are spectacular and are emphasized by a series of horse neigh like cries. During these games, the male will present the female a small fish or a small bundle of water plants.

If the female accepts this token, a couple is formed. The plants she receives will be used to build a flowing nest.
The Great Crested Grebe usually nests in the near vicinity of coots, in order to benefit from their protection. The female will lay 3 or 4 eggs during April.

Both partners incubate the eggs for 25 to 28 days, when the chicks hatch. The chicks have a thick fluff and distinctive marks. They will follow quickly their parents: on their backs or hidden under their wings during dives.