tubenoses fly like shearwaters, with stiff wings and shearing technique across wave fronts. This technique saves energy. During breeding season they utilize coastal cliffs on islands, laying their single egg in a burrow. Conservation The conservation status of bird species are designated by BirdLife International on behalf of the International Union for Conservation of Nature. The white-chinned, spectacled and black petrel are classified as "Vulnerable", the grey petrel as "Near-threatened" and the Westland petrel as "Endangered". All five members of the genus are listed in the Agreement on the Conservation of Albatrosses and Petrels. References Sources Procellariidae Bird genera Taxa named by Carl Linnaeus