The team is keen to establish just how big the area's daffodil population is – and the size of any other well-populated sites.
The Narcissus pseudonarcissus is the only wild daffodil species native to Britain and is threatened by the encroachment of garden daffodils which could cause hybrid species to grow.
True wild daffodils can be recognised from the more showy garden varieties and hybrids by their altogether smaller, but perfectly formed, appearance. It is still a sizable wildflower that grows in groups creating striking carpets of colour in early spring.
Wild daffodils grow mainly in partial shade in habitats such as woodlands, on riverbanks or in fields and grassland with clay or loam soils which are not too acidic. These habitats are abundant in Rosedale which is why the daffodils are growing there.
The national park wants to categorise how densely the daffodils are growing, note how successful their flowering is and, by using photographs taken from the same key areas each year, look at the success of the Rosedale daffodils.
Anyone walking in Rosedale in the spring months, or who is a keen photographer or a Rosedale resident with wild daffodils on their land can get involved. Email Alex Cripps at firstname.lastname@example.org or telephone 01439 772700.