Soup's Food Chain
andrew campbellにより
1. sun
1.1. maple tree (producer)
1.1.1. squirrel (primary consumer)
1.1.1.1. snake (secondary consumer)
1.1.1.1.1. hawk (tertiary consumer)
1.1.1.2. owl (secondary consumer)
1.2. grass (producer)
1.2.1. cow (primary consumer)
1.2.2. bunny (primary consumer)
1.2.2.1. fox (secondary consumer)