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ecology · biology education

Forest food chain

A forest food chain can begin with sunlight and oak leaves. Caterpillars eat the leaves, songbirds eat caterpillars, and a red-tailed hawk can prey on smaller birds. This sequence shows one route by which energy moves from a producer to consumers. The decomposer box reminds readers that dead leaves and animals become food for organisms that return nutrients to the soil. Forest ecosystems include many more links: birds may eat fruit or insects, hawks take varied prey, and oak trees produce acorns as well as leaves. Use this chain to practise reading arrows and identifying producers, consumers, and decomposers before introducing a more complete food web.

Type FlowchartStandard Sugiyama layered DAG + orthogonal routingEngine schematex-flowchartUpdated 9/24/2026
Forest energy flow
Drawing preview
The request

“Draw a forest food chain with sunlight feeding oak leaves, then caterpillar, songbird, and red-tailed hawk, plus decomposers receiving dead oak leaves, caterpillars, songbirds, and hawks.”

Then tryAdd a squirrel that eats oak acorns.Change the top predator to an owl.
What is in this drawing

Read the decisions behind it.

01Plant producer

Use oak leaves as the forest food source.

02Herbivore link

Connect caterpillar to the leaves.

03Bird predator

Place songbird before the hawk.

04Recycling

Show decomposers receiving matter from every level.

Use this as a simple deciduous-forest chain for biology class or an ecology worksheet.

More like this

Other examples in this family.

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Grassland food chainecologyOpen →
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Arctic marine food chainecologyOpen →

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FAQ

Common questions

Why are oak leaves at the base?

Oak trees are producers, and their leaves provide stored energy for herbivores such as caterpillars.

What type of consumer is a caterpillar?

It is a primary consumer because it eats plant material.

Does a food chain include every forest species?

No. It shows one pathway; a food web represents the many connected pathways.