This stamp is part of a set of five that pays tribute to the beauty and importance of pollinators. Two of the most iconic, the monarch butterfly and the western honeybee, are shown pollinating a variety of North American plants.

A bee buzzing around the patio might provoke anxiety, while a butterfly fluttering over the lawn inspires childlike wonder. But both of these insects are simply going about their business, providing the vital ecological service of pollination.

As with their fellow pollinators – other insects, birds and bats – they are rewarded with sweet nectar as they shuttle pollen from blossom to blossom. The plants are rewarded, too. They can then produce the seeds that bring their next generation. Humans also benefit. We can thank insect pollinators for about a third of the food that we eat, particularly many of the fruits and vegetables that add colorful variety and important nutrients to our diet.

Monarch butterflies (Danaus plexippus) and western honeybees (Apis mellifera), also called European honeybees, are two of North America's most iconic pollinators. Both travel far and wide. Monarchs can flutter thousands of miles in one of nature’s most wondrous migrations, a multigenerational round-trip that can cross southern Canada, the north-south breadth of the contiguous United States, and deep into Mexico, where they rest for the winter before returning north.

While western honeybees do not naturally migrate such distances, beekeepers truck their hives on long-haul migrations, accommodating agricultural growing seasons around the nation. These bees are far and away the continent’s most vital pollinators, servicing almond, citrus, peach, apple and cherry tree blossoms, plus the blossoms of berries, melons, cucumbers, onions and pumpkins, to name just a few. Surpluses of honey, created from nectar by honeybees as a nonperishable food source for their hives, is yet another benefit to humans.

In this modern world, these pollinators need mindful human intervention in order to thrive. The hives of western honeybees have lately been raided by parasitic mites and plagued by Colony Collapse Disorder, a mysterious condition which disorients bees and causes them to abandon their hives. While monarch butterflies, utterly dependent on milkweed plants throughout their range and specific mountain forests in Mexico, face collapsing populations as these habitats disappear to accommodate farming, urban development and illegal logging.

Throughout North America, efforts to halt logging, study the effects of agricultural herbicides and pesticides, and plant long swaths of flowers along stretches of highway and other such rights-of-way offer promise. On a grassroots level, individuals and groups can help provide for pollinators by planting locally appropriate flowers — a win–win for people and pollinators alike.