Which groups of species are more vulnerable to extinction?

Step-by-step solution

Extinctions across taxa are not random; some groups like amphibians appear to be more vulnerable to extinction . Adding to the grim scenario of extinctions is the fact that more than 15,500 species world-wide are facing the threat of extinction. Presently, 12 per cent of all bird species, 23 per cent of all mammal species, 32 per cent of all amphibian species and 31per cent of all gymnosperm species in the world face the threat of extinction