Kevin Schafer / Bumblebee (Bombus sp) on flower, Juneau, Alaska

Thomas Marent / Cotton-top Tamarin (Saguinus oedipus) with red pollen after feeding on flower nectar, Tayrona National Natural Park, Colombia

Clay Bolt / Central bumble bee (Bombus centralis) pollinating wildflowers in the Bridger Range, Bozeman, Montana. August.

Michael Durham / Honey Bee (Apis mellifera) with pollen baskets, Oregon

Donald M. Jones / Gila Woodpecker (Melanerpes uropygialis) feeding on Saguaro (Carnegiea gigantea) cactus flower, southern Arizona

Donald M. Jones / Curve-billed Thrasher (Toxostoma curvirostre) feeding on Saguaro (Carnegiea gigantea) cactus flower, southern Arizona

Christian Ziegler / Bucket Orchid (Coryanthes panamensis) flower attracting bee for pollination through scent, Panama

Glenn Bartley / Violet-crowned Woodnymph (Thalurania colombica) female feeding on nectar, Costa Rica

Christian Ziegler / Bumblebee Orchid (Ophrys bombyliflora) flower and its male Longhorn Bee (Eucera sp) pollinator, Sardinia, Italy

Suzi Eszterhas / Digger Bee (Melissodes sp) pollinating Engelmann Prickly Pear (Opuntia engelmannii) flower, Red Corral Ranch, Texas

Pete Oxford / Galapagos Sulphur Butterfly (Phoebis sennae marcellina) feeding on cactus flower, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Michael & Patricia Fogden / Green Violet-ear (Colibri thalassinus) hummingbird feeding at and pollinating epiphytic Orchid (Elleanthus sp), Costa Rica