It has been one of the warmest springs and animals and plants are appearing earlier than usual, according to BBC Springwatch results.
Tens of thousands of people took part in the Springwatch survey across the UK to look out for animals and plants.
The hawthorn plant and peacock butterfly have been seen more than a month earlier than usual.
CBBC is also getting in on the action - a new programme called Springwatch Trackers is starting on Monday.
The CBBC show will be hosted by Kirsten O'Brien and teams of boys and girls will be sent out each day to track down different animals, like red squirrels, deer, owls and bats.
Experts say that spring is coming earlier because of the warmer temperatures we've been having.
Red-tailed bees, ladybirds and frog spawn were spotted about two weeks ahead of their usual appearance.
Expert Nick Collinson said he was concerned that things were changing so quickly.
He added: "We know that wildlife is under pressure."
CBBC's Springwatch Trackers will be on at 8am, Monday to Friday, starting on Monday, 28 June.