Horned grebe – Podiceps auritus
is a member of the grebe family of water birds. It is also known as the Slavonian grebe. It is an excellent swimmer and diver, and pursues its fish prey underwater. The horned grebe is a small grebe at 31–38 cm (12–15 in) long with a 46–55 cm (18–22 in) wingspan. Unmistakable in summer, the plumage of both male and female includes a black head with brown puffy earlike tufts along the sides of its face. It shows a deep red neck, scarlet eyes, and a small, straight black bill tipped with white. It rides high in the water.

It sounds like this
recording by Terje Kolaas from Xeno canto