Bumblebees are important pollinators of both crops and wildflowers. Flies may have been among the evolutionarily earliest pollinators responsible for early plant pollination. One of the possible pollinators to assist in cross-pollination are honeybees. The flowers can be a major nectar source for honeybees and other pollinators. These blooms are very good at attracting bees and other pollinators. Orchard mason bees are also used as supplemental pollinators in commercial orchards. Often hoverflies are considered to be the second most important pollinators after wild bees. Flying foxes have important roles as seed dispersers and pollinators. Native plants provide suitable habitat for native species of butterflies, birds, pollinators, and other wildlife. They rely on nocturnal pollinators such as bats or moths for fertilization. Delphiniums can attract butterflies and other pollinators. Butterflies are important as pollinators for some species of plants. "Liatris spicata" is excellent for attracting pollinators and beneficial insects. It functions to attract insect or bird pollinators. Hummingbirds are the main pollinators of heliconia flowers in many locations.