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I see giant tadpoles and small black ones. Are these the same type of tadpoles at different stages? | Ponds & Lakes Q&A

Q: I see giant tadpoles and small black ones. Are these the same type of tadpoles at different stages?

Q: I see giant tadpoles and small black ones. Are these the same type of tadpoles at different stages?

Roxanne – Summerfield, FL

A: From your description, it sounds like you have different types of tadpoles living in your pond. But to know for certain, let’s discuss how to distinguish bullfrog and toad tadpoles and understand how they develop into adults.

Egg-Citing Development

Both bullfrogs and toads reproduce by laying eggs in the water. Female bullfrogs deposit their eggs on the pond surface in large round clusters or masses protected by aquatic plants. One bullfrog can lay up to 20,000 eggs, which are then fertilized by the males. Toads create strands of dark-colored eggs that look like black pearls attached to foliage and leaves near the water’s edge.

After seven to 10 days, frog or toad tadpoles hatch from their eggs. Bullfrog tadpoles appear dark green to black in color and they’re big – much larger than other species of frog or toad. They also mature more slowly when compared to their toad counterparts. In fact, bullfrogs will stay in their tadpole stage for almost three years before transforming into adults.

From Adolescent to Adult

A toad’s and frog’s physical development from tadpole (or pollywog) to adult are similar. As tadpoles, they live exclusively in the water and nibble on aquatic plants for nourishment. At first, their bodies are long and narrow and include a tail where they store fat when food is in short supply during the winter months. Eventually, the tadpoles will start to grow back legs, followed by their front legs. And then their tails shorten and disappear, and they develop lungs. Before long they’re full-fledged adults.

Survive and Thrive

As with most critters in the wild, the strongest will survive – and tadpoles are no different. Out of the thousands of pollywogs that are born, only a percentage will make it to adulthood. They have, however, evolved some survival traits that protect them from predators, including their camouflage color that makes them excellent at hiding.

You can help boost their survival numbers by installing a decoy device, like an Owl Decoy or Nite Guard Solar®, designed to chase away rodents and snakes. With its timed head rotation powered by a built-in solar panel, the Owl Decoy will help repel nuisance birds and other small critters during the day. And the Nite Guard Solar® LED lights that resemble a predator’s glowing eyes will keep your pond – and your toads and frogs – safe at night.

Pond Talk: What kinds of frogs and toads live in your pond or lake?

Protect From Rodents &;amp Snakes - Scarecrow® SOL-R Action Owl

Top Blog Posts of 2014

2014 brought lots of unusual weather, which caused some unique challenges and inquiries for pond owners. Thank you for all your questions and comments. Here are the top blogs for 2014, read by you! As always, if you have questions or comments, please feel free to send them our way! 

We wish you a safe and happy 2015.
From The Pond Guy® Staff

Top 5 Blog Posts in Pond & Lake

Top Blog Posts of 2014 - Pond & Lake

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Q: I bought bullfrog tadpoles for my pond. What do I need to know about them?

Q: Someone told me I need to do the Jar Test. What is that?

Q: I’m looking to cut back on energy costs. Can I shut off my waterfall at night?

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Happy New Year from The Pond Guy(r)

I bought bullfrog tadpoles for my pond. What do I need to know about them?| Decorative Ponds & Water Gardens Q & A

Q: I bought bullfrog tadpoles for my pond. What do I need to know about them?

Q: I bought bullfrog tadpoles for my pond. What do I need to know about them?

Iris – Kirkland, WA

A: Those big croaking amphibians sure love living in a water garden. Bullfrogs gobble pesky bugs and nibble on nuisance algae while entertaining their human hobbyists with their leaping prowess and trance-inducing ribbit-ribbit songs.

When they’re adults, bullfrogs are impressive creatures: As one of the largest frogs in the world, they grow to 8 inches long and weigh up to 1½ pounds. When they’re tadpoles, they’re impressive, too. The dark green swimmers measure up to 6 inches long, which is larger than most other frog species, and sport a dorsal fin that begins behind its arrowhead-shaped body.

Caring for your tadpoles involves understanding their habitat, diet and developmental stages. Here’s what you need to know to grow your baby bullfrog into a beefy bug-eating adult.

Healthy Habitat

Bullfrog tadpoles like to swim in shallow water on fine gravel bottoms. As they grow, they tend to move into deeper waters. They have speckled-skin camouflage to help protect them from predators, but you should still plan to provide a wide variety of floating and submerged plants, like parrots feather, frogbit and water lilies, as well as rocks and other hides to your pond. The little guys will hang out among them should a hungry bird or fish fly or swim by for a bite to eat.

Algae, Please

When they’re young, bullfrog tadpoles are herbivores that love to nibble on the string algae that forms along your rocks and under plants. Though they have been observed eating frog eggs (gasp!) and other newly hatched tadpoles, the algae should keep them more than satisfied – at least until they become adults. That’s when they become carnivorous critters with a hankering for bugs, rodents, reptiles, birds, small fish and even an occasional bat.

From Tadpoles to Adulthood

While they’re in their tadpole – or pollywog – stage, these tiny gilled critters live exclusively in the water. But after about one year, the tadpoles will start to grow legs. Shortly thereafter, they grow arms. As their tails shorten, they develop lungs and their gills disappear. The tadpole, now several years old depending on where it’s growing up, has finally transformed into a froglet that can make the leap from water to dry land.

Once your tadpole has grown into an adult, you can expect that bad boy to be around for 8 to 10 years. Enjoy your new pond pal! Ribbit!

Pond Talk: Have you ever been to a frog-jumping contest? If so, tell us about it!

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