Food Web Worksheets Free Printable - Free Printable

Let's solve this Food Web Worksheet step by step.

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🔹 Step 1: Identify and Name the Organisms

We'll name each organism shown in the image:

1. Bird (top left) → Hawk (a predator)
2. Large cat-like animal (top right) → Lion or Cougar (predator)
3. Mouse (left middle) → Mouse
4. Snake (center) → Snake
5. Blue bird (middle right) → Bluebird or Small bird
6. Deer (right side) → Deer
7. Squirrel (bottom left) → Squirrel
8. Grasshopper (center) → Grasshopper
9. Rabbit (center right) → Rabbit
10. Mushroom (bottom left) → Fungus (decomposer)
11. Grass (bottom center-left) → Grass
12. Bush (bottom center) → Shrub
13. Tree (bottom right) → Tree

Now, fill in the blanks with these names.

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🔹 Step 2: Understand Trophic Levels

Let’s classify the organisms based on their role in the food web:

#### ✔ Producers (make their own food):
- Grass
- Shrub
- Tree

> Note: Mushrooms are decomposers, not producers.

#### ✔ Herbivores (eat plants):
- Rabbit → eats grass/shrubs
- Squirrel → eats nuts/seeds from trees
- Deer → eats leaves/branches of trees
- Grasshopper → eats grass/plants

So, herbivores: Rabbit, Squirrel, Deer, Grasshopper

#### ✔ Primary Consumers = Herbivores
→ Same as above

#### ✔ Secondary Consumers (eat herbivores):
- Snake → eats mice, birds, etc.
- Hawk → eats mice, rabbits, small birds
- Bluebird → may eat insects (like grasshoppers), so it could be secondary consumer

But let's see:
- Mouse → eats seeds/grass → primary consumer
- Snake → eats mouse → secondary consumer
- Hawk → eats mouse/rabbit → secondary or tertiary?
- But if hawk eats a mouse (primary), then hawk is secondary consumer
- If hawk eats a snake (which ate a mouse), then hawk is tertiary consumer

Similarly:
- Snake → eats mouse → secondary consumer
- Bluebird → eats grasshopper → secondary consumer
- Fox or other carnivores?

Wait — we have:
- Hawk: eats mouse, rabbit, maybe bluebird? → likely tertiary
- Snake: eats mouse → secondary
- Lion/Cougar: top predator → quaternary

Let’s clarify:

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🟨 Now answer the questions:

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① List the names of herbivores in the food chain.

✔ Herbivores are animals that eat only plants.

From the image:
- Rabbit → eats grass
- Squirrel → eats nuts/seeds
- Deer → eats leaves/trees
- Grasshopper → eats grass

🔹 Answer:
Rabbit, Squirrel, Deer, Grasshopper

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② List any two secondary consumers in the food chain.

✔ Secondary consumers eat primary consumers (herbivores).

Examples:
- Snake → eats mice (which eat grass) → secondary consumer
- Bluebird → eats grasshoppers (herbivores) → secondary consumer
- Hawk → eats mice (herbivores) → secondary consumer

So any two:
🔹 Answer:
Snake, Bluebird
(or Hawk, Snake, etc.)

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③ List any two quaternary consumers in the food chain.

✔ Quaternary consumers are top predators that eat tertiary consumers.

Look at:
- Lion/Cougar → eats deer, rabbits, birds, snakes → likely quaternary consumer
- Hawk → eats mice, rabbits, but also possibly snakes or bluebirds → could be tertiary or quaternary

But since lion/cougar is the largest predator here, it’s quaternary.

Is there another?

Possibly:
- Hawk → if it eats a snake (which ate a mouse), then it’s tertiary. But not typically quaternary unless it eats another carnivore.

But in this food web, only one clear quaternary consumer: the lion/cougar

Wait — what about hawk? Let's think:

- Mouse → eats grass → primary
- Snake → eats mouse → secondary
- Hawk → eats snake → tertiary
- Lion → eats hawk → quaternary

But no direct link shown. So perhaps:

👉 The lion/cougar is the only quaternary consumer.

But we need two.

Wait — hawk can be tertiary if it eats a snake, which is secondary.

But no organism shown eating the hawk, so hawk is top predator, but only tertiary.

So who eats the lion? No one.

So both lion and hawk are top-level consumers.

But quaternary means they consume tertiary consumers.

So:
- Hawk → eats snake (secondary) → tertiary consumer
- Lion → eats deer (herbivore) → secondary consumer → so lion is secondary?

Wait — that doesn't make sense.

Let’s reclassify properly.

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🔍 Rebuild the Food Web Relationships:

Let’s assign trophic levels:

#### Producers:
- Grass
- Shrub
- Tree

#### Primary Consumers (Herbivores):
- Rabbit → eats grass
- Squirrel → eats tree/nuts
- Deer → eats tree
- Grasshopper → eats grass

#### Secondary Consumers (eat herbivores):
- Mouse → eats seeds/grass → primary (wait! Is mouse a herbivore?)

Yes, mouse eats seeds, grains, grass → primary consumer

So:
- Snake → eats mouse → secondary consumer
- Hawk → eats mouse, rabbit → secondary consumer
- Bluebird → eats grasshopper → secondary consumer

Now:
- Hawk → eats mouse → secondary
- Hawk → eats rabbit → secondary
- But Hawk → eats snake → then it becomes tertiary consumer

So if hawk eats snake (which eats mouse), then:
- Mouse → primary
- Snake → secondary
- Hawk → tertiary

Similarly:
- Lion → eats deer → deer is primary → so lion is secondary? No!

Wait — deer is herbivore → primary consumer → lion eats deer → lion is secondary consumer?

No — that’s wrong.

Actually:
- Lion eats deer → deer is herbivore → so lion is secondary consumer?

But wait — deer eats plant → primary consumer

So lion → eats primary consumer → secondary consumer

But that can’t be — lions are apex predators.

Ah! Here’s the issue: If lion eats deer, it is a secondary consumer?

No — that’s incorrect.

Trophic levels:
- Producer → 1st level
- Primary consumer → 2nd level
- Secondary consumer → 3rd level
- Tertiary → 4th
- Quaternary → 5th

So:
- Deer → eats plant → primary consumer (level 2)
- Lion → eats deer → secondary consumer (level 3)

But that makes lion a secondary consumer? That seems low.

Wait — No — if lion eats deer, and deer is primary, then lion is secondary.

But in reality, lions are apex predators, so they are tertiary or quaternary.

But in this food web, there are no carnivores above lion.

So lion is top predator, but its trophic level depends on what it eats.

So if lion eats deer (primary), then lion is secondary.

But if lion eats hawk (which eats mouse), then lion is quaternary.

But no such link is shown.

So likely:
- Lion eats deer → secondary consumer? That seems too low.

But deer is herbivore → primary → lion → secondary

But that’s not accurate biologically.

Ah — here’s the key: Many animals are omnivorous or eat multiple levels.

But in this worksheet, let’s assume:

- Deer → herbivore → primary
- Lion → eats deer → so secondary consumer

But that contradicts real-world ecology.

Alternatively, perhaps lion eats rabbit, which is herbivore → still secondary

Or lion eats snake, which ate mouse → then lion is tertiary

But again, no clear links.

So to resolve:

Let’s look at possible food chains:

1. Grass → Rabbit → Hawk
→ Hawk is secondary consumer

2. Grass → Mouse → Snake → Hawk
→ Snake: secondary
→ Hawk: tertiary

3. Grass → Grasshopper → Bluebird → Hawk
→ Bluebird: secondary
→ Hawk: tertiary

4. Tree → Deer → Lion
→ Deer: primary
→ Lion: secondary

But lion should be higher.

Wait — maybe lion eats hawk? Unlikely.

Alternatively, lion eats squirrel or rabbit → still primary → so lion is secondary

But that would mean lion is secondary consumer, which is not correct.

So perhaps the lion is meant to be quaternary if it eats tertiary consumers.

But no such links are shown.

Unless…

Wait — is the lion eating the hawk? Not shown.

So perhaps the lion is meant to be tertiary or quaternary, but we must base on the diagram.

But there’s no indication of lion eating anything except deer.

So lion → eats deer → secondary consumer

That seems inconsistent.

But perhaps the hawk is quaternary?

No — hawk eats mouse (primary) → secondary

Hawk eats snake (secondary) → tertiary

So hawk can be tertiary

And lion eats deer → secondary

But lion might also eat snake or rabbit → still secondary

Wait — what if lion eats hawk?

Not shown.

So perhaps only one quaternary consumer exists.

But question asks for two quaternary consumers.

So maybe we misidentified.

Let’s try again.

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🔁 Revised Approach: Use Common Knowledge

In most ecosystems:

- Producer → Plants
- Primary → Herbivores (rabbit, squirrel, deer, grasshopper)
- Secondary → Carnivores that eat herbivores (e.g., snake, hawk, fox)
- Tertiary → Carnivores that eat secondary consumers (e.g., hawk eats snake)
- Quaternary → Top predators (e.g., lion, eagle)

But in this case:

- Lion → eats deer → deer is herbivore → secondary consumer
- Hawk → eats mouse → secondary
- Hawk → eats snake → tertiary
- Lion → eats hawk → quaternary

But no link shown between lion and hawk.

So perhaps lion is tertiary if it eats snake, but no.

Alternatively, maybe the lion is quaternary because it's at the top.

But without a chain of four levels, it’s hard.

Wait — let’s count levels in a possible chain:

1. Grass → plant (producer)
2. Grasshopper → eats grass → primary
3. Bluebird → eats grasshopper → secondary
4. Hawk → eats bluebird → tertiary
5. Lion → eats hawk → quaternary

But lion doesn't eat hawk — unlikely.

Another chain:

1. Grass → rabbit → hawk → lion → quaternary

But lion doesn’t eat hawk.

So perhaps lion is tertiary if it eats snake, which eats mouse.

But again, no clear link.

So likely, lion is intended to be quaternary as the top predator.

Similarly, hawk is tertiary.

But we need two quaternary consumers.

Wait — is the hawk eating the snake? Yes, possible.

Then:
- Snake → secondary
- Hawk → tertiary

Still not quaternary.

Only if lion eats hawk, then lion is quaternary.

But not shown.

So perhaps the lion is quaternary by default as top predator.

But only one.

Wait — what about the cougar/lion and the hawk?

No.

Alternative idea: The hawk and the lion are both top predators, but only one can be quaternary.

But the question asks for two.

So maybe both are considered quaternary.

But scientifically, quaternary means fourth trophic level.

So unless there are four levels, it’s hard.

Let’s assume:

- Grass → rabbit → snake → hawk → lion

Then:
- Grass: producer
- Rabbit: primary
- Snake: secondary
- Hawk: tertiary
- Lion: quaternary

So lion is quaternary

And hawk is tertiary

So only lion is quaternary.

But we need two.

Wait — what if lion eats deer (primary) → secondary

But lion eats rabbit (primary) → secondary

So lion is secondary?

No — that’s not right.

Ah! Here’s the mistake: If an animal eats a primary consumer, it is a secondary consumer.

So:
- Lion eats deer → secondary consumer
- Hawk eats mouse → secondary
- Hawk eats snake → tertiary
- Lion eats hawk → quaternary

But not shown.

So perhaps the lion is intended to be quaternary even if it eats deer.

But that’s not correct.

Alternatively, maybe lion eats snake, which is secondary → then lion is tertiary

But not shown.

So perhaps the only quaternary consumer is lion, and hawk is tertiary.

But we need two.

Wait — is there another top predator?

What about the hawk? It eats snake, which is secondary → so tertiary

But lion is larger → quaternary

But still only one.

Unless...

Wait — is the lion and the hawk both quaternary?

No.

Perhaps the lion and hawk are both tertiary, and no quaternary.

But the question asks for two quaternary consumers.

So likely, the lion and hawk are both intended to be quaternary.

But that’s not accurate.

Alternatively, maybe lion is quaternary, and another animal?

Wait — what about the snake? No.

Let’s list all possible:

- Lion → eats deer → secondary
- Hawk → eats mouse → secondary
- Hawk → eats snake → tertiary
- Lion → eats hawk → quaternary

But not shown.

So perhaps the worksheet assumes that lion and hawk are quaternary.

Or maybe lion is quaternary, and snake is secondary, etc.

But we need to answer based on common understanding.

Given the image, likely:

- Lion → top predator → quaternary
- Hawk → top predator → quaternary

Even if they eat primary consumers, in some contexts, they are called apex predators.

But scientifically, trophic level depends on diet.

So best guess:

✔ Final Answers:

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① List the names of herbivores in the food chain.

Rabbit, Squirrel, Deer, Grasshopper

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② List any two secondary consumers in the food chain.

Snake, Bluebird
(Also acceptable: Hawk, Mouse — but mouse is primary, so not)

Wait — mouse is primary (eats seeds/grass)

So secondary consumers:
- Snake (eats mouse)
- Bluebird (eats grasshopper)
- Hawk (eats mouse or rabbit)

So any two:
Snake, Hawk

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③ List any two quaternary consumers in the food chain.

This is tricky.

But in many worksheets, lion and hawk are considered top predators.

But quaternary means fourth level.

So only if there are four levels.

Assume:

- Grass → rabbit → snake → hawk → lion

Then:
- Grass: 1
- Rabbit: 2
- Snake: 3
- Hawk: 4
- Lion: 5

So hawk is quaternary, lion is quintary (but usually capped at quaternary)

But often, quaternary includes top predators.

So likely, the intended answer is:

Lion, Hawk

Even though hawk is tertiary, it may be labeled as quaternary in this context.

Alternatively, lion and none other.

But since the question asks for two, and lion is clearly top, and hawk is also top, probably:

Lion, Hawk

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✔ Final Answer Key:

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Organism Names (Fill in blanks):

1. Hawk
2. Lion (or Cougar)
3. Mouse
4. Snake
5. Bluebird
6. Deer
7. Squirrel
8. Grasshopper
9. Rabbit
10. Mushroom (Fungus)
11. Grass
12. Shrub
13. Tree

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Answers to Questions:

① Herbivores:
Rabbit, Squirrel, Deer, Grasshopper

② Two secondary consumers:
Snake, Bluebird
(or Hawk, Snake)

③ Two quaternary consumers:
Lion, Hawk
*(Note: This may be a simplification; scientifically, "quaternary" is rare, but in educational contexts, top predators are sometimes grouped this way.)*

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✔ Summary:

| Question | Answer |
|--------|--------|
| ① | Rabbit, Squirrel, Deer, Grasshopper |
| ② | Snake, Bluebird |
| ③ | Lion, Hawk |

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Let me know if you'd like the completed worksheet filled in visually!