Butterflies visit a wide range of flowers, preferring brightly coloured blooms (red, yellow, orange), and they fly during warm weather. They are perching feeders, therefore flowers need to offer them a landing platform. Butterflies have the tendency to visit a few flowers on a plant and then fly to another: this makes them good pollen vectors, as they can carry pollen long distances. This facilitates cross-pollination (i.e. pollination between different individuals of the same plant species) and ensures a good mixture of genes.