Darter
WordNet
noun
(1) A person or other animal that moves abruptly and rapidly
"Squirrels are darters"
(2) Fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill
WiktionaryText
Noun
- Any of various darting freshwater fish of the family Percidae, that are usually small and brightly coloured and are native to North America.
- A waterbird with a long neck in the family Anhingidae.