Food Web Worksheets Free Printable - Free Printable

Let's analyze the food web step by step and answer each question.

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Understanding the Food Web

- Producers: Organisms that make their own food (usually through photosynthesis).
→ Plants are the only producers in this web.

- Primary Consumers (Herbivores): Organisms that eat producers.
- Secondary Consumers: Eat primary consumers.
- Tertiary Consumers: Eat secondary consumers.
- Quaternary Consumers: Eat tertiary consumers.
- Arrows indicate the direction of energy flow — from what is eaten to what eats it.

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Now, let’s go through each question:

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1. How many producers are there?

→ There is 1 producer: Plants.

✔ Answer: 1

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2. How many herbivores are there?

Herbivores eat plants directly. From the diagram:
- Rabbits
- Squirrels
- Mice
- Seed-eating Birds
- Herbivorous Insects

These all consume plants.

✔ Answer: 5

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3. How many carnivores are there?

Carnivores eat other animals. Let's identify them:

- Foxes (eat rabbits, squirrels, mice, birds)
- Hawks (eat foxes, snakes, birds, insects, etc.)
- Snakes (eat birds, insects, toads)
- Toads (eat insects)
- Predacious Insects (eat herbivorous insects)
- Spiders (eat insects)
- Insectivorous Birds (eat insects)

All these eat animals.

So, carnivores:
- Foxes
- Hawks
- Snakes
- Toads
- Predacious Insects
- Spiders
- Insectivorous Birds

✔ Answer: 7

> Note: Even though some may be higher-level consumers, they are still carnivores (meat-eaters).

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4. How many primary consumers are there?

Primary consumers = herbivores (eat plants).

From above:
- Rabbits
- Squirrels
- Mice
- Seed-eating Birds
- Herbivorous Insects

✔ Answer: 5

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5. How many secondary consumers are there?

Secondary consumers eat primary consumers.

Look at who eats the herbivores:
- Foxes eat rabbits, squirrels, mice → secondary consumers
- Hawks eat rabbits, squirrels, mice, seed-eating birds → secondary consumers
- Snakes eat insectivorous birds, but also herbivorous insects? Wait — check arrows.

Wait! Let's trace carefully:

#### Who eats primary consumers?

- Foxes → eat rabbits, squirrels, mice → secondary
- Hawks → eat rabbits, squirrels, mice, seed-eating birds → secondary
- Insectivorous Birds → eat herbivorous insects → secondary
- Spiders → eat herbivorous insects → secondary
- Predacious Insects → eat herbivorous insects → secondary
- Toads → eat predacious insects and herbivorous insects → secondary
- Snakes → eat toads, spiders, insectivorous birds → but do they eat primary consumers directly?

Wait — look at arrows:
- Snake eats insectivorous birds, toads, spiders, and predacious insects — not directly herbivores.
- So snake is not a secondary consumer; it's higher.

But do any other organisms eat primary consumers?

Yes:
- Foxes, Hawks, Insectivorous Birds, Spiders, Predacious Insects, Toads — all eat primary consumers.

Let’s list all that eat primary consumers:

- Foxes → rabbits, squirrels, mice → ✔
- Hawks → rabbits, squirrels, mice, seed-eating birds → ✔
- Insectivorous Birds → herbivorous insects → ✔
- Spiders → herbivorous insects → ✔
- Predacious Insects → herbivorous insects → ✔
- Toads → herbivorous insects → ✔

So, 6 organisms are secondary consumers.

✔ Answer: 6

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6. How many tertiary consumers are there?

Tertiary consumers eat secondary consumers.

Who eats secondary consumers?

Look at the arrows:

- Hawks → eat insectivorous birds, spiders, predacious insects → yes, they eat secondary consumers → ✔
- Snakes → eat toads, spiders, insectivorous birds → all secondary consumers → ✔
- Foxes → eat rabbits, squirrels, mice, seed-eating birds → these are primary consumers → so foxes are secondary, not tertiary
- But wait: Hawks also eat snakes? Yes — arrow from snake to hawk → so hawks eat snakes → tertiary

So let’s list:

- Hawks → eat insectivorous birds (sec), spiders (sec), predacious insects (sec), and snakes (tertiary) → so hawks are tertiary (and possibly quaternary)
- Snakes → eat toads, spiders, insectivorous birds → all secondary → so snakes are tertiary consumers
- Foxes → no arrows from them to secondary consumers (they only eat primary consumers) → not tertiary
- Toads → eat insects → primary → so they’re secondary
- Predacious Insects, Spiders, etc. → eat herbivores → secondary

So:
- Snakes → eat secondary consumers → ✔ tertiary
- Hawks → eat secondary consumers → ✔ tertiary

Are there others?

What about foxes? No — they don’t eat secondary consumers directly.

So:
- Snakes
- Hawks

✔ Answer: 2

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7. How many quaternary consumers are there?

Quaternary consumers eat tertiary consumers.

Who eats tertiary consumers?

- Hawks → eat snakes → snakes are tertiary → so hawks are quaternary
- Any others?

Do foxes eat snakes? No arrow.
Do snakes eat hawks? No.
Only hawks eat snakes.

So:
- Hawks → eat snakes → quaternary

✔ Answer: 1

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8. Which organisms are both primary and secondary consumers?

An organism that eats plants (primary) AND other animals (secondary).

Check each organism:

- Rabbits → only eat plants → only primary
- Squirrels → only plants → primary
- Mice → plants → primary
- Seed-eating Birds → plants → primary
- Herbivorous Insects → plants → primary
- Predacious Insects → eat herbivorous insects → secondary → but do they eat plants? No → not primary
- Spiders → eat insects → secondary → not primary
- Toads → eat insects → secondary → not primary
- Insectivorous Birds → eat insects → secondary → not primary
- Snakes → eat birds, toads, insects → all animals → carnivore → not primary
- Foxes → eat rabbits, squirrels, mice → all primary → so foxes are secondary, not primary
- Hawks → eat rabbits, squirrels, mice → primary consumers → so hawks are secondary consumers here → but do they eat plants? No → not primary

Wait — is any organism both?

Wait — seed-eating birds eat seeds (plants) → primary consumer.

But do they eat anything else?

No — only plants → only primary.

Wait — no organism seems to eat both plants and animals.

But let's double-check: Is there any omnivore?

Looking at the arrows:

- None of the animals have arrows pointing to both plants and animals.

But humans are often omnivores, but not here.

Wait — what about "seed-eating birds"? They eat seeds → plants → primary.

Do they eat insects? The diagram doesn't show that.

Similarly, insectivorous birds → only insects → secondary.

So none of the organisms shown are both primary and secondary consumers.

But wait — are there any?

Hold on — predacious insects? Do they eat plants? No — they eat herbivorous insects.

Herbivorous insects? Only plants.

Spiders? Only insects.

So — none.

But wait — some birds might eat seeds and insects — but in this diagram, seed-eating birds are labeled as eating only plants, and insectivorous birds only insects.

So no organism is both.

But maybe we missed something.

Wait — toads? Eat insects → secondary → not primary.

No.

So — none.

But let’s reconsider: are there any organisms that eat both plants and animals?

Not according to this diagram.

But wait — hawkes? They eat rabbits (primary) → so secondary consumer. But do they eat plants? No.

So no organism is both primary and secondary.

But perhaps the question means: organisms that can act as both — but in this web, none are shown doing both.

So:

✔ Answer: None

But let’s think again.

Wait — is there an organism that eats plants AND animals?

No.

But — look at "Predacious Insects" — they eat herbivorous insects → secondary.

Do they eat plants? No.

But herbivorous insects → only plants.

Wait — what about "Seed-eating Birds"? They eat seeds → plants → primary.

But if they also ate insects, they'd be omnivores — but the diagram shows only one arrow from plants → seed-eating birds.

So no.

Thus, no organism is both primary and secondary.

✔ Answer: None

But maybe the question expects none.

Alternatively, perhaps foxes? But they only eat animals.

Wait — maybe I missed one.

Wait — no.

So final answer: None

But let’s see if any animal has two types of arrows.

No.

So:

✔ Answer: None

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9. What do the arrows indicate?

The arrows point from the prey to the predator — indicating the direction of energy flow.

So:

✔ Answer: The arrows indicate the direction of energy flow (who eats whom).

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✔ Final Answers:

1. 1
2. 5
3. 7
4. 5
5. 6
6. 2
7. 1
8. None
9. The arrows indicate the direction of energy flow (who eats whom).

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Let me know if you want a diagram explanation or need help visualizing trophic levels!