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During the first day the eggs on the female's back will sink into the skin and by evening will be set into the back of the female. Two days later, the yolks of most of the eggs are beneath the skin level and only parts of the jelly and outer membranes of the eggs are visible on the backs above.
The two main shapes for the microhylids are wide bodies and narrow mouths and normal frog proportions. Those with narrow mouths generally eat termites and ants, and the others have diets typical of most frogs. Egg-laying habits are highly varied.
These frogs lay their eggs in aerial foam nests; upon hatching, tadpoles drop to the water under the nest and complete their development there. [3] [4] Some species like Rhacophorus kio will wrap this and cover this foam nest with leaves.
When it is time, the males migrate to the water. They then make a call at the same time. This lures the females to the water, where they mate. The females lay their eggs in clumps of 10–90, and usually put them on and under vegetation and leaf litter in the pond. Females usually lay their eggs in shallow, calm water that has little action ...
Hydric brooding is an egg incubation practice performed by some species of frogs. It involves either placing urine from the bladder on the eggs to keep them wet or holding the body over the eggs to prevent them from drying out. [1] [2] [3] [4]
This makes the species even more unique, as PLOS One said, because other frogs that skip the egg step typically give birth to froglets, or baby frogs, but these frogs still give birth to tadpoles.
Egg mortality in foam nesting tree frogs remains mostly unexplored, therefore information regarding the matter is limited. Grey foam-nest tree frogs' egg mortality is considered moderate compared to other anuran species. Following the embryonic development, a tadpole breaks free and drops into the water below the foam nest.
Males were spaced at least 1 foot (0.30 m) apart, all facing the shore [17] Eggs are laid in gelatinous strings of 13 to 52 eggs per inch (2.5 cm), in masses of up to 16,500 per clutch. [6] [18] Egg development rate is partially dependent on temperature; hatching times vary. [16] Metamorphosis is usually completed within three months of egg laying.