Related topics: species

Biologists investigate the role of the largest animal brain cells

The brains of most fish and amphibian species contain two types of conspicuously large nerve cells. These are the largest cells found in any animal brain. They are called Mauthner cells and trigger lightning-fast escape responses ...

When frogs die off, snake diversity plummets

Since 1998, scientists have documented the global loss of amphibians. More than 500 amphibian species have declined in numbers, including 90 that have gone extinct, due to the fungal pathogen Batrachochytrium, commonly known ...

A new ranavirus threatens US amphibian diversity

Kudzu and emerald ash borer are widely known examples of an invasive plant and an invasive insect, respectively, that cause harm to our native plants. Their impacts are obvious in our landscapes. Not so well known are the ...

Amphibians infected by ranavirus found in Atlantic Rainforest

Researchers have found bullfrog tadpoles with clear signs of infection by ranavirus in Brazil. The specimens were collected from two ponds in the city of Passo Fundo, South of the country (state of Rio Grande do Sul), in ...

Environmental oxygen triggers loss of webbed digits

Free fingers have many obvious advantages on land, such as in locomotion and grasping, while webbed fingers are typical of aquatic or gliding animals. But both amphibians and amniotes—which include mammals, reptiles, and ...

The extinction crisis is 'unprecedented in human history'

A recent landmark United Nations report delivered an alarming assessment of the fate of animal life and biodiversity on Earth. According to the authors—145 experts from fifty countries—up to 1 million species are threatened ...

Are otters threatening amphibian populations?

The Eurasian otter typically eats fish, but amphibians, which are in global decline, are also part of its diet, especially when fish are scarce. In a Mammal Review study, researchers identified bones of amphibians in otter ...

Even more amphibians are endangered than we thought

At least a quarter of the world's approximately 8,000 known species of amphibian are recognized as threatened and at risk of extinction. But due to a lack of data on many amphibian species, only about 44 percent of amphibians ...

Expert explains key role of frogs in healthy ecosystems

Dr. Jodi Rowley explains why frogs are so vital for healthy ecosystems, how she is working to conserve them and the positive impact she has already made to the study of amphibians in Southeast Asia.

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