Corroboree+Frogs


 * Corroboree Frog **

fertilisation is external. The female lays up to 38 eggs in small burrow in sphagnum moss (a moss which holds a great deal of water, like a sponge). As the eggs are laid, the male sheds sperm directly onto the eggs. Males stay in their nests most of the summer, trying to attract numerous females and build other nests if their first fills with eggs.
 * Fertilisation: **

Each egg looks a bit like a marble, made of a jellylike substance. They enlarge quickly, absorbing large quantities of water so they don't dry out during summer. The tadpoles develop in about 4 weeks but, unlike other tadpoles, they stay in their egg jelly for about 6-7 months. They finally hatch out of the jelly when the nests are flooded by melting snow and autumn rains.
 * Survival of the Embryo: **