The hawkbill phyler has split from its ancestor and has specialised in hunting the nectarling line. The hawkbills beak has evolved a sharp hook at the front that is designed to catch a nectarling and be able to break it up to feed. Because their food lives around the sugar-trunked balloonarch, this is also where the hawkbills spend most of their lives. They roost and nest on the baloonarches.
To hunt, hawkbills need to fly high in the sky to avoid being spotted. For this they have evolved stronger wings that allow them to glide on warm air currents. They have also evolved keener eyesight to spot the camouflaged nectarlings from such a height. Once they see possible prey, they will fly towards its prey at high speed and catch it in its sharp beak.
Their social structure is similar to their ancestor but their flocks are significantly smaller and they can still toot using their butt-nostrils.