1. Animal Types
Amphibians

2. Objectives Explain how Amphibians breath
Describe Amphibians metamorphosis
Describe the 3 groups of amphibians, and give an example of each
Explain why amphibians are ecological indicators

3. Did You Know???
The Ornate Horned Frog found in Argentina, can eat an entire mouse with one swallow

4. Amphibians
The word Amphibian means “double life” because amphibians live on land and water
Their eggs do not have a shell to prevent water loss, this means that eggs must be laid in water

5. Thin Skin Amphibian skin is thin, smooth and moist
They drink water and breath through their skin

6. Characteristics of Amphibians – Double Life
Metamorphosis – Changes an animal goes through in its life
Most amphibians change form as they grow older
After hatching a frog embryo becomes a tadpole
A tadpole has gills and a tail

7. Double Life As the frog grows, it loses its tail and gills
This change is called Metamorphosis

8. Types of Amphibians
There are 3 types of Amphibians – Caecilians, Salamanders and Frogs

9. Tadpoles
Tadpole found in Pennypack Park
Tadpole from the classroom

10. Caecilians Caecilians look like snakes or earth worms
They live in tropical environments
They hunt small invertebrates

11. Salamanders
Salamanders live under stones and logs in the woods of North America
Salamander are very much like prehistoric amphibians but much smaller
Some salamanders breath through their skin and have no lungs

12. This is a Salamander found in Pennypack Park in the Fall

13. Frogs Toads are a type of frog, with drier bumpier skin
They can live anywhere on earth except very cold climates
Frogs have very strong legs for jumping

14. Frogs - Ears
They also have well developed ears for listening to other frogs

15. Frogs – Vocal Sacs
Frogs have a Vocal Sac that holds air against there vocal cords
When they sing they can be
marking territory or attracting mates
Their songs are Innate

16. This is a Green Frog found in Pennypack Park in the summer time

17. This is a Bullfrog that can be found in Pennypack Park in the summer.

18. Frog at the Baltimore Aquarium

19. Review
Amphibian eggs have no shell and must be laid in water so they don’t dry out
Amphibians breath and drink through their thin skin
Most amphibians go through a metamorphosis
The three types of amphibians are Caecilians, Salamanders and Frogs