Rolf Nussbaumer / Solitary bee, adult perched on Mexican hat (Ratibida columnifera) Dinero, Lake Corpus Christi, South Texas, USA.

Jim Brandenburg / Coneflower (Echinacea sp) field, Wisconsin

Claudio Contreras / Mexican hat (Ratibida columnifera) flowers, Laredo Borderlands, Texas, USA. April

Claudio Contreras / Mexican hat (Ratibida columnifera) flowers along lakeside path, Laredo Borderlands, Texas, USA. April

Jim Brandenburg / Prairie Coneflower (Ratibida pinnata) flowers

Larry Michael / Prairie coneflower {Ratibida pinnata} with cobweb over flowers, USA

Rolf Nussbaumer / Mexican Hat {Ratibida columnifera} flower, Texas, USA

Tim Fitzharris / Southern Hawker Dragonfly (Aeshna cyanea) on Prairie Coneflower (Ratibida pinnata), New Mexico

Jim Brandenburg / Mexican Hat (Ratibida columnifera) cluster, Nebraska

Jim Brandenburg / Prairie Coneflower (Ratibida pinnata), South Dakota

Jim Brandenburg / Prairie Coneflower (Ratibida pinnata), South Dakota

Jim Brandenburg / Purple Coneflower (Echinacea purpurea) field, Minnesota