This weekend, it's time to pick up your binoculars, dust off your identification book and join up to half a million other citizen scientists in taking part in this year's Big Garden Birdwatch.
The world's biggest garden wildlife survey has been running since 1979 and has recorded over 137 million birds.
Taking part is simple. For one hour this weekend, the RSPB is asking people to watch and record the birds they see in their garden or local green space and then send them in.
Blue tit (left) and great tit (right)
The data, when compared over the past 40 years, allows the RSPB to monitor how species are faring. Like starlings, which have dropped by 81% since 1979.
It also highlights that when thousands are inspired to make a small change that benefits wildlife, like planting a particular shrub or adding a bird box, entire species can benefit.
Find out what you can do to help birds in your garden here:
The number of starlings in the UK has decreased by 81% since 1979
Any educators out also have until the 2nd of February to sign up to RSPB Big Schools’ Birdwatch.
This parallel event takes place during the first half of the spring term (6 January – 21 February 2020) and again only takes one hour to complete. Find out more information here.
Get involved with the Big Garden Birdwatch and find out more information here. And you can submit your results here by the 11th of February.
We'd love to see how you're getting involved! Share your #BigGardenBirdWatch with the community!