Numbers of the most common type of British ladybird, the seven-spotted ladybird, are dropping, say experts.
Researchers from the Centre for Ecology and Hydrology think that the cold and wet weather we've had this year has contributed to the decrease in numbers.
They say the heavy rain has washed away their usual food of greenflies, blackflies and whiteflies.
Scientists have asked people to report sightings of seven-spot ladybirds with a free mobile phone app.
'60 aphids a day'
Dr Roy, who co-ordinates UK sightings of ladybirds, said: "It has been a phenomenally low spring for seven-spots, which are a predatory species and rely on aphids. They need to eat 60 aphids a day."