true warbler

NOUN
12 LETTERS · STARTS WITH T

true warbler is a valid 12-letter word worth 16 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1R1U1E1W4A1R1B3L1E1R1
1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 3 + 1 + 1 + 1 =16 PTS
DOUBLE WORD → 32TRIPLE WORD → 48
MEANING

What does true warbler mean?