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. Snakes are carnivorous reptiles. Large snakes eat large animals. Small ones eat small ones. The smallest snakes eat insects and other invertebrates. Most snakes eat rodents or birds after either killing them with venom or squeezing them to death in constricting coils. They mostly eat small animals because most snakes aren't that big.