American Bullfrog Froglet Reabsorbing Tail

Bullfrog Metamorphosis
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Frog Development from Tadpole to Froglet to Adult
 


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American Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing Tail
American Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing Tail
American Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing Tail
American Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing Tail
American Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing Tail
American Bullfrog Froglet Reabsorbing Tail
American Bullfrog Froglet Reabsorbing TailAmerican Bullfrog Froglet Reabsorbing Tail
Page last updated 8/2015
Bullfrog Tadpoles Delivered from Carolina Biological Supply
Bullfrog Tadpole, Note "Whiskers" Around Mouth
American Bullfrog Tadpole Growing at Differemt Rates
American Bullfrog Metamorphosis: Tadpole to Frog
This page is devoted to bullfrog tadpole metamorphosis with photos of our bullfrogs at different stages of their development. Below are photos and descriptions of the three bullfrog tadpoles that we followed through metamorphosis.

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OBSERVING METAMORPHOSIS

It can take up to two years for bullfrog tadpoles to change into frogs, but once front legs appear, change happens very quickly. It takes less than 10 days for a bullfrog tadpole to change into a frog once it sprouts front legs !

American Bullfrog Froglet Reabsorbing Tail
BIGGIE TAD's Metamorphosis
Bullfrog Tadpoles Before Metamorphosis
We ordered bullfrog tadpoles online from Carolina Biological Supply, and housed them in a 10-gallon aquarium. When the tadpoles arrived, they were all about the same size and very similar in appearance, so we named them all Tad.

For several months the tadpoles just grew bigger, but not at the same rate, so they ranged in size from very big Tads to teeny Tads. Here are pictures of our tadpoles before they began metamorphosis.

Large and Small Bullfrog Tadpoles
Side View of American Bullfrog Tadpole in Aquarium
Bullfrog Tadpole: Note the black outline of the mouth and the surrounding "whiskers."
Top left: The tadpoles were shipped to us in Michigan during winter. They arrived in a large cardboard shipping box with a Styrofoam box inside and a heat pack. Top right and directly left: The tadpoles mouths are surrounded by little "whiskers" to help them suck up algae and nibble on plants in the tank.  
Above left: Side view of American bullfrog tadpole. 

Above right 
and directly right: Although similar in size when shipped to us, the tadpoles grew at different rates.
American Bullfrog Metamorphosis
Since we received the tadpoles in December 2012, all have died. Four died as tadpoles and one jumped out of a small opening in the tank, after changing into a frog (we have since closed that opening). "Lumpy", our bullfrog superstar, only recently died, but lived to ripe old age of three years. Below are the three tadpoles that we have tracked, or are tracking through metamorphosis: Biggie Tad, Lumpy & Tiny Tad. Biggie is the frog who died after jumping out of the tank. 

Bullfrog Froglet That Recently Metamorphosized from Tadpole
American Bullfrog Tadpole with Rear Legs
Rear legs first appeared 5/17/13
American Bullfrog Tadpole with Rear Legs
Two days later rear legs larger and bend at knee 5/19/13
American Bullfrog Tadpole Rear Legs
Rear legs 5/24/13
American Bullfrog Tadpole with Well-developed Rear Legs
Rear legs well-developed 6/9/13
Bullfrog Tadpole Body Changing Shape Into Frog
Tadpole has front legs and  body begins to change shape 6/18/13
Bullfrog Tadpole Froglet Reabsorbing Tail
Tadpole looks like a frog with a tail 6/21/13
Tadpole continues 
to reabsorb tail 6/23/13
Biggie Tad is a frog 6/25/13

Time Table for 
BIGGIE TAD's Metamorphosis

  • Tadpole ~ 9 months old before began metamorphosis.
  • Began metamorphosis 5-17-13: Rear legs appeared.
  • 23 days: Rear legs continued to grow.
  • 32 days: Front legs appear and head begins to change shape.
  • 35 days: Tadpole looks like frog with tail. Begins reabsorbing tail. 
  • 37 days: Froglet continues reabsorbing tail.
  • 39 days: Metamorphosis complete. 

FREE FROGGIE ACTIVITIES!

Printable Tadpole 
Coloring Page     
Frog Life Cycle Wrod Search
Bullfrog Tadpole Coloring Page
As a science educator and mom, I always look for ways to make science fun and interesting for my own elementary school-age children. One of the features of the Home School Science area of this website is a detailed look at our adventures with bullfrogs, including how to find and care for bullfrog tadpoles
Home School Science! 
Young children are natural born scientists, full of curiosity! Join the at-home experiments and explorations of a scientist mom & her kids.
Kid's Watching Moon Jellies
The SPO website is best viewed in Microsoft Explorer, Google Chrome or Apple Safari.

BULLFROG UPDATE!
Latest Tadpole News 
2/3/2015
Sad news today. Lumpy, the little bullfrog we raised from a tadpole 2 years ago, died of unknown causes today. 
Ribbit-In-Peace buddy!

Thanks for showing us how cool frogs are!

> See Lumpy's Story 
on the Tadpole
 Metamorphosis Page

Bullfrog That Recently Completed Metamorphosis
Continued ... 
Go to PAGE 2 >

See Page 2 to meet our most famous bullfrog "Lumpy" and watch a tadpole video!!
The information on this page falls into four categories:
  • Bullfrog tadpoles before metamorphosis.

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