Counting the UK's rabbits and hares
Scientists are asking the public to report sightings of rabbits and hares, as part of a conservation effort.
It's easier to spot the animals in the spring when the breeding season is under way.
The Mammal Society, who want to gather the data, say hares might be declining in some parts of the UK.
Rabbit numbers have also fallen in some areas where there have been outbreaks of disease. But in other areas, populations are so big that they're thought of as pests by some people.