The Birdvoice PEN helps you to enhance your skills in recognising Bird calls and Songs. The lite version has a waterproof field guide of over 290 European Birds songs and calls along with the Talking Birdcall diary which has two indexes: species sorted in scientific order and also sorted alphabically. So for example, if you wished to distinguish between different types of Tits, go to the Scientific order. If you wished to just remember what a kestrel sounded like along with a brief audio description the go to the Alphabetical order. Each of the 60 blank pages has six sound spots for you to enhance your written notes and drawings with audio.