Dave Bevan / Welsh mountain sheep (Ovis aries) grazing amongst Bluebells (Hyacinthoides non-scripta), Carmarthenshire, Wales, UK, May.

Tim Fitzharris / Desert Bluebell (Phacelia campanularia) flowers and Teddy Bear Cholla (Cylindropuntia bigelovii) cacti in spring, Anza-Borrego Desert State Park, California

Tim Fitzharris / Indian Paintbrush (Castilleja miniata) and Mountain Bluebells (Mertensia ciliata) flowering, American Basin, Colorado

MYN / Krista Schlyer / Harebell (Campanula rotundifolia) in flower, near Lily Lake in Rocky Mountain National Park, Colorado, Rocky Mountain Bioblitz August 2012. Meetyourneighbours.net project

Duncan Usher / Small Tortoiseshell (Aglais urticae) butterfly feeding on Bluebell (Campanula rotundifolia) flower nectar, Lower Saxony, Germany

Tim Fitzharris / California Poppy (Eschscholzia californica) and Desert Bluebell (Phacelia campanularia) flowers, Canyon Hills, Santa Ana Mountains, California

Hermann Brehm / Mountain bluebell {Mertensia ciliata} flowering amongst rocks, Glacier NP, Montana, USA

Tim Fitzharris / Desert Bluebell (Phacelia campanularia) flowers and Teddy Bear Cholla (Cylindropuntia bigelovii) cacti in spring, Anza-Borrego Desert State Park, California

Tim Fitzharris / Desert Bluebell (Phacelia campanularia) and Chuparosa (Justicia californica) flowers, Anza-Borrego Desert State Park, California

Tim Fitzharris / Desert Bluebell (Phacelia campanularia) and California Desert Dandelion (Malacothrix californica) flowers in spring bloom, Anza-Borrego Desert State Park, California

Tim Fitzharris / Desert Bluebell (Phacelia campanularia) flowers in spring bloom with barrel cacti, Anza-Borrego Desert State Park, California

Tim Fitzharris / Desert Bluebell (Phacelia campanularia) flowers in spring bloom with barrel cacti, Anza-Borrego Desert State Park, California

Tim Fitzharris / Mountain Bluebell (Mertensia ciliata) and Groundsel (Senecio sp) flowering on mountain, American Basin, Colorado

Tim Fitzharris / California Poppy (Eschscholzia californica) and Desert Bluebell (Phacelia campanularia) flowers, Canyon Hills, Santa Ana Mountains, California

Jeff Foott / Colorado Blue Columbine (Aquilegia caerulea), Splitleaf Indian Paintbrush (Castilleja rhexifolia) and Mountain Bluebell (Mertensia ciliata) flowers, Colorado

Dave Bevan / Welsh mountain sheep grazing amongst Bluebells (Hyacinthoides nonscripta), Carmarthenshire, Wales, UK, April.