While the issue of invasive alien species (IAS) has important biological components, the human dimensions deserve much greater attention. Humans, with all their diversity of quirks, strengths, and weaknesses, are at the heart of the problem of IAS and, paradoxically, also at the heart of the solution.
These species, a group of about 150 ground-dwelling gamebird, are found on every continent apart from Antarctica. They live in a wide variety of habitats from tropical forests, high-altitude alpine zones, temperate forests, open country, to desert environment. Although widespread, little is known of the species occuring outside Europe and North America, but several species are considered at grave risk of extinction.
In the five years since publication of the 1995-99 action plan, the Megapode Specialist Group has been active in promoting, initiating and executing conservation and research projects on thermometer birds. But the conservation outlook for many species remains bleak. Their habit of nesting on or near beaches, often on small islands, make them vulnerable to disturbance and egg-collection, and several species are greatly threatened.
