Birds come in many shapes, sizes, and colours. From the tiny hovering hummingbird, to the giant emus sprinting across the desert plains of Australia's outback, the exhilarating penguins "flying" through frigid waters to catch fish, and the great albatross that fly incredible distances across the oceans.
Many bird species around the world are threatened by habitat loss, climate change, fisheries bycatch, the illegal wildlife trade and a host of other threats.
