Assertion or assert may refer to: Assertion (software development), a computer programming technique. assert.h, a header file in the standard library of the C programming language. Assertion definition language, a specification language providing a formal grammar to specify behaviour and interfaces for computer software.
Grass snakes prey mainly on amphibians, especially the common toad and the common frog, although they may also occasionally eat ants and larvae. Captive snakes have been observed taking earthworms offered by hand, but dead prey items are never taken.
There are NO vegetarian snakes; all species are carnivores. The diet depends on the species. Some will specifically eat warm blooded prey (rodents, rabbits, birds), while others eat insects, frogs or amphibians, eggs, other reptiles, fish, earthworms, or slugs. Snakes swallow their food whole. It is important to understand the normal diet for a particular snake.