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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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