Jeremy Mynott begins his capacious and disarming new book with a dedication to his wife, the author Dianne Speakman. ‘In all our twenty-five or so years together,’ he writes, ‘I have never yet succeeded in persuading her to take the slightest interest in birds. This is my best and last shot.’ Any ornithophile knows this feeling: the regret that his sense of wonderment remains for the most part private, something that others regard as slightly weird or ridiculous.