Steve Downer / Timelapse of Primrose (Primula vulgaris) flowers opening, UK. March. Controlled conditions.

Michael Hutchinson / Common primrose (Primula vulgaris) flowers Bristol, UK

Ross Hoddinott / Common primroses {Primula vulgaris} in flower, near Bradworthy, Devon, UK.

Heather Angel / Common bee fly (Bombylius major) nectaring on Primrose (Primula vulgaris). This insect is the main pollinator of Primrose. In nature reserve, Surrey, England, UK, April.

Philippe Clement / Common primrose / English primrose (Primula vulgaris) in flower on moss covered rock in spring, Scotland, UK, May

David Tipling / Primroses (Primula vulgaris) and Violet (Viola odorata) growing along banks of mountain stream Caithness, Scotland, UK, May.

David Tipling / Primroses (Primula vulgaris) growing along banks of mountain stream Caithness, Scotland, UK, May.

Dave Bevan / Slow motion clip of a Dark edged bee fly (Bombylius major) nectaring from a Primrose flower (Primula vulgaris), Carmarthenshire, Wales, UK, May.

Nick Upton / Common primroses (Primula vulgaris) flowering in a garden, Wiltshire, UK, April.

Laurie Campbell / Primrose (Primula vulgaris) flowers in decidious woodland, Berwickshire, Scotland, April.

Laurie Campbell / Primrose (Primula vulgaris) on floor of decidious woodland, Berwickshire, Scotland, April.

Andy Sands / Common primrose (Primula vulgaris) in flower, Hertfordshire, England, UK, March