scaup

1. The top of the head; the skull.
2. The part of the head where the hair grows from, or used to grow from.
3. A part of the skin of the head, with the hair attached, formerly cut or torn off from an enemy by warriors in some cultures as a token of victory.

   Some tribes used to collect scalps to prove how many of the enemy they had killed in battle.

4. The skin of the head of a stag with the horns attached.
5. A victory, especially at the expense of someone else.
6. A bed or stratum of shellfish.
7. The top; the summit.

noun

Any of three species of small diving duck in the genus Aythya.