Amphibians are small vertebrates that need water ... Some transport water, oxygen, and carbon dioxide either into or out of the animal. Others fight bacteria or fungal infections.

Imagine a world where the boundaries between “fish” and “not-fish” blur, where the ancestors of birds and mammals once swam ...

Vertebrates are animals that have a backbone inside their body. The major groups include fish, amphibians, reptiles, birds and mammals. Invertebrates don't have a backbone. They either have a soft ...

Vertebrates, for example, are divided into mammals, birds, reptiles, amphibians and fish. Mammals are warm-blooded animals with hair or fur and can produce milk to feed their young. They have ...

“Amphibians have thin, permeable skin, unlike other land animals such as humans ... of the planet where the group of water-sensitive vertebrates known as anuran amphibians — frogs, toads ...

A recent global review found that more than 20% of reptile species were in decline and at risk of extinction. This is similar ...

The latest research shows that amphibians – which can live both in water and on land – remain the animals most at risk, with 41 per cent of them threatened with extinction, higher than 26.5 ...