The word birdwatched is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 24
Highest Scoring Words With Friends™ Plays In The Letters birdwatched
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Seven Letter Word Alert: (27 words)
batched, bawdier, bedward, bewitch, birched, birthed, bracted, braided, breadth, carbide, catbird, chaired, charted, cheddar, decabit, diehard, dihedra, ditched, ditcher, rawhide, rebatch, rewatch, watched, watcher, witched, witcher, writhed