It's the Royal Society for the Protection of Birds 10th Big Schools' Birdwatch birthday.
This free, fun and simple activity only takes an hour to complete, is rich in curriculum links, and is open to all UK schools and youth groups (brownies, scouts etc). It's a great way to get to know more about the wildlife visiting your school grounds, or a local park.
Activities run runs between 24 January–4 February 2011.
Not sure how to take part in? Just follow the step-by-step guide: