Life Cycle of a Frog Diagram
Free printable life cycle of a frog diagram — a labeled illustration of the eggs, tadpole, froglet and adult frog stages. Download a high-resolution PDF or PNG for Letter paper.
The four stages of a frog's life
A frog changes form as it grows, through a process called metamorphosis. Here is what happens at each labeled part of the diagram:
| Stage | What it does | Why it matters |
|---|---|---|
| Eggs | A jelly-like clump of eggs (frogspawn) is laid in the water. | The jelly coating around each egg isn't just decoration — it acts as a protective shield against bacteria and small predators, and keeps the developing embryo moist. A single clump of frogspawn can contain thousands of eggs because most won't survive, so large numbers are the frog's way of ensuring at least some make it. |
| Tadpole | The eggs hatch into tadpoles that swim and breathe with gills. | Gills allow tadpoles to pull dissolved oxygen straight from the water, the same way a fish does — without them, a tadpole would drown in the very pond it was born in. This aquatic stage also lets tadpoles feed on algae and grow rapidly before the energy-expensive process of building legs and lungs begins. |
| Froglet | The tadpole grows legs and lungs but still has a tail. | Having both gills fading out and lungs developing at the same time means the froglet can survive in two worlds at once — a critical safety net during the most vulnerable stretch of its life. Skip this in-between stage and the frog would have no transition period, forced to switch instantly from water to land with no practice breathing air. |
| Adult frog | The tail disappears and the adult frog can live on land, ready to lay new eggs. | Losing the tail isn't just cosmetic — the body actually reabsorbs it as a nutrient source, recycling the material to fuel the final changes. Once fully grown, the adult frog becomes a predator of insects and a prey animal for birds and snakes, sitting in the middle of the food chain and helping keep ecosystems in balance. |
Companion worksheet
A free fill-in worksheet with an answer key, built from the labels above — students match each stage to its description, then answer a couple of short questions. Great for a quick check after using the diagram.
How to print
Choose Download PDF for a ready-to-print file that fits US Letter paper (8.5 × 11") in landscape, or Download PNG for the high-resolution image.
Frequently asked questions
What are the stages of a frog's life cycle?
The four stages are the eggs (frogspawn), the tadpole, the froglet, and the adult frog.
What is a tadpole?
A tadpole is the young, fish-like stage of a frog that lives in water and breathes with gills before it grows legs.
What paper size should I print this on?
The diagram is sized for standard US Letter paper (8.5 × 11") in landscape orientation. Use "Download PDF" for a print-ready file that fits the page automatically.