Invertebrates, such as ants, bees, wasps, beetles, butterflies, moths, flies, mosquitoes, and midges all act as pollinators. In the United States alone, pollination by insects contributes to $40 billion worth of products annually (Reference: The Importance of Pollinators, The Xerces Society).

There are over 3,500 native bee species in the United States. They pollinate many crops including almonds, apples, avocados, blueberries, cantaloupes, cherries, cranberries, cucumbers, sunflowers, and watermelon. Examples of native pollinating bees are sweat bees (Family: Halictidae) which take their name from their habit of landing on people and licking their skin, squash bees (Peponapis pruinosa) which collect pollen only from cucurbits like squash, pumpkins, and gourds, and leafcutter bees (Megachile spp.) which prefer legume blossoms.