Eggs to Toads, Gr. K-2


ESP Unit Tips: 


1. An easy source of water that is safe for eggs and tadpoles is tapwater that has been in an open container for a day or two so the chlorine can escape. There is really no need to find pond or rainwater to replace evaporating water as the unit progresses.

2. When your eggs arrive, place them all in one container of water. After they have hatched, divide the tadpoles among all of your aquaria so that no container has more than 6 or 8 tadpoles. If tadpoles are crowded, they develop much more slowly.

3. When tadpoles first hatch, they are very inactive for a day or two while they use the food they received in the egg to start growth.

4. A good food for tadpoles is lettuce leaves that have been put in boiling water or microwaved for 25 seconds. Start out with about a one inch square in each aquarium. Add more as soon as this is eaten. Start adding a pinch of the kit tadpole food as back legs appear. The lettuce floats at the surface, allowing students to see the tadpoles feeding.

5. Since by week eight the tiny toads need tiny insects to eat, it is best to let them go at this point. You can feed them wingless fruitflies, available from sources like:

Petco, The Fruitfly Shop, and Big Apple Pet Supply. Aphids can be another good food source for little toads. Look around your garden and bring in a plant clipping full of insects for your toads.

Below are a few good links for toads and their relatives.

The Amphibians page of The Amphibian Ark has a lot of useful information.

AmphibiaWeb is still being developed but already has many useful resources including information about declining amphibian populations worldwide.

Chicagoland Frogs has pictures and calls of many of the frogs and toads found in New York State.

The Cortland Herpetological Site has a variety of resources including photos, sound files, and a project where New York State high school students can assist with monitoring frog populations.

The Exploratorium in San Francisco has an exhibit about frogs.

Frogs for Kids has pictures, sounds and information about many of the species found in New York State, including the Common Toad.

Frogland has some interesting resources on frogs as pets (not always a good idea for native frogs), frog jokes, what you can do to save frogs, and more.

The Oregon Coast Aquarium has an on-line mystery for students to tackle called the Case of the Disappearing Frogs.
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