How a snake can occupy multiple tropic level ?

Please find below the solution to the asked query

Snake can either be secondary consumer or tertiary consumer and can occupy multiple trophic levels depending the type of food eaten. For example, snake eating a mouse in a forest occupies the third trophic level in the food chain. However, snake eating a frog in a forest occupies fourth trophic level in the food chain because frog eats insects. Thus, to satisfy its food needs the snake occupies more than one trophic level at the same time.  

Hope this information will clear your doubts about the topic.

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It could be explained by the following example 1) Grass -> grasshopper -> SNAKE -> vulture 2) Grass -> grasshopper -> RAT -> SNAKE -> vulture
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I thought the same :) it was just for clarification, allthough thanks !
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