Wildlife charity says YOU can help
The first big joint stocktake of animals and insects in the UK, has found that one in ten creatures could disappear.
The organisations involved have listed a number of reasons for this, such as the weather and changing habitats.
The hedgehog is one of the animals that is most at risk, their numbers have dropped by a third since 2000.
Rosslyn Colderly from Lancashire Wildlife Trust explains why this has happened and she tells Ricky that everyone can help their local wildlife flourish.
Read more: Half of UK wildlife in decline