I hope you had a great Easter weekend with time to get outdoors and explore the natural world - hopefully with at least a little sunshine?
One of the highlights of my stroll yesterday was doing a spot of fish-watching. By peering into the clear waters of a stream, I saw something I hadn't seen before - a male three-spined stickleback defending his territory. His bright red belly and bluish sides looked like they'd win admiring glances in a tropical fish tank any day.
The little stickleback has inspired me to find out more about fish and other creatures I know very little about. What did you see at the weekend?
If you fancy watching watery wildlife, head to one of our nature reserves.
Ray Kennedy took this beautiful photograph. Browse RSPB Images to find more gorgeous photos like this one. You can order a print or canvas of any one that takes your fancy!