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Why Amphibians Are in Decline?
In recent years, scientists and conservationists have been working to raise public awareness of a global decline in amphibian populations. Herpetologists first started noting that amphibian populations were falling at... Read more
| Facts About Frogs
Frogs are the most familiar group of amphibians. They have worldwide distribution with the exception of the polar regions, some oceanic islands, and the driest of deserts.... Read more
| How Many Animal Species Are There?
Estimating the number of animal species that inhabit our planet is an exercise in educated guesswork. Despite the challenges, it is valuable to have some idea of how many... Read more
| Invertebrates
Invertebrates are a diverse group of animals that includes over 30 phyla. Invertebrates do not have a backbone, nor a bony skeleton. This large group of animals includes sponges, cnidarians, flatworms, roundworms, segmented worms, molluscs, echinoderms, and arthropods. About 97 percent of all known species are invertebrates. The articles listed below provide information about the characteristics, classification and evolution of invertebrates.
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