This annual survey has been happening for over 40 years and over a million people (and teddy bears!) joined in last year and counted over 17 million birds! That's a lot of birds! The top three birds on the list last year were the house sparrow (for the 18th year running), the blue tit and the starling.
You can take part too by logging on to www.rspb.org.uk/Birdwatch and you can request a free guide to help you work out what to do and how to report how many birds you count. Have fun!!