Search results
Results from the WOW.Com Content Network
Amphibians reproduce by fertilizing eggs outside of the female's body (see frog reproduction). Of the seven amplexus modes (positions in which frogs mate), these frogs are found breeding in inguinal amplexus, where the male clasps the female in front of the female's back legs until eggs are laid, and the male fertilizes the egg mass with the ...
Australian water dragons have long powerful limbs and claws for climbing, a long muscular laterally-compressed tail for swimming, and prominent nuchal and vertebral crests. [11] (A nuchal crest is a central row of spikes at the base of the head. These spikes continue down the spine, getting smaller as they reach the base of the tail.) [12]
The male grasps the female tightly with his forelimbs either behind the arms or in front of the back legs, or in the case of Epipedobates tricolor, around the neck. They remain in amplexus with their cloacae positioned close together while the female lays the eggs and the male covers them with sperm.
The male caecilians have a long tube-like intromittent organ, the phallodeum, [52] which is inserted into the cloaca of the female for two to three hours. About 25% of the species are oviparous (egg-laying); the eggs are laid in terrestrial nests rather than in water and are guarded by the female.
The fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. [2] These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly larger than their minor claw, whilst females claws are both the same size. [3]
Chelae also play an important role in many species mating rituals, such as to communicate and attract prospective mates, wherein species with asymmetrical chelae use their enlarged chela as a display to attract mates. Chelae are also used in the act of mating, where the male species will often use them to hold onto the female during the act. [5]
Animals: Amphibians · Arachnids · Birds · Cnidaria · Crustaceans · Echinoderms · Fish · Insects · Mammals · Molluscs · Reptiles · Others White-lipped tree frog , by Charlesjsharp Pristimantis elegans , by Charlesjsharp
[18] [19] [21] Among extant freshwater turtles, only the little-known giant softshell turtles of the genera Chitra, Rafetus, and Pelochelys, native to Asia, reach comparable sizes. In mature specimens, those with a straight carapace length over 30 cm (12 in), males and females can be differentiated by the position of the cloaca from the ...