(1) Perhaps 10 to 30 percent of Earth's mammal, bird, and amphibian species are facing extinction.

(2) It says no other road-legal amphibian has managed to exceed 6mph on water.

(3) In both mammalian and amphibian eggs, integrins have been proposed as putative sperm receptors.

(4) Unfortunately for them, in December of 1941 the company was also given the go-ahead to develop an amphibian .

(5) In addition to ecological studies investigating the timing of amphibian metamorphosis, a considerable amount of work has addressed the endocrine control of metamorphosis.

(6) In dry years, such as the year of this study, ponds were dry by mid-June, invertebrate and amphibian larvae were unable to develop enough to metamorphose and emerge from the water.

(7) One of the most urgent problems in conservation biology today is the continuing loss of amphibian populations on a global scale.

(8) Spadefoot toads are desert-dwelling amphibians that breed opportunistically in short lived pools filled by periodic rainfall.

(9) Many other types of animals - both amphibians and reptiles - shared the Triassic world.

(10) Secondarily aquatic adult amphibians provide another source of diversity.

(11) Young amphibians , like the larval frog or tadpole pictured here, spend their early years in the water, breathing through gills in the side of their head in much the same way as fish do.

(12) Among vertebrates, newts and other urodele amphibians show a remarkable capacity for regeneration.