A flock of rare choughs turn up at Scatterbrook Farm, and a group of avid twitchers follow on closely behind.

After a raging thunderstorm, a flock of rare choughs turn up at Scatterbrook Farm. Keen to seize the opportunity of scaring such a rarely sighted bird, Worzel enlists the help of Susan and John. But their plans are soon scuppered once word of the choughs gets around and a group of avid twitchers move in before he's even had his chance.

To make matters worse, the twitchers' arrival forces Mr B to come to face to face with his old birdwatching rival, Lee Dangerman. With the twitchers refusing to leave, can the children come up with a plan to help scare the choughs and save Worzel and Mr B from embarrassment?