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.
While many creatures snack on snakes as a side dish, few predators eat only snakes. The exceptions are some birds of prey and snakes which eat snakes! Birds are major snake predators: not just birds of prey but also little itty bitty birds which eat baby snakes. Some birds specialise in snakes: The Secretary Bird worries a snake to death, dancing around it, stomping on it and throwing it up in the air until it dies. The Road Runner also eats snakes.