Didapper

noun

1. The dabchick or little grebe of Europe, Podicipes or Sylbeocyclus minor.
2. One of sundry other small grebes, as the pied-billed dabchick, Podilymbus podicipes.
3. See dabchick.
4. A small diving water bird frequenting rivers and fresh waters, specifically a little grebe.
5. One who disappears for a time and suddenly reappears.