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The unisexual females often look like blue-spotted salamanders but have hybrid genomes [9] and require sperm from a co-occurring, related species to fertilize their eggs and initiate development. Usually the eggs [ 10 ] then discard the sperm genome and develop asexually (i.e., gynogenesis , with premeiotic doubling); however, they may ...
Spotted salamanders do produce poisonous skin secretions, which allow them to taste bad to predators. For a human, these skin secretions are more irritating and would not kill an adult or even a ...
The spotted salamander is about 15–25 cm (5.9–9.8 in) long, [7] with females generally being larger than males. [8] They are stout, like most mole salamanders, and have wide snouts. [3] The spotted salamander's main color is black, but can sometimes be a blueish-black, dark gray, dark green, or even dark brown.
The skin of some species contains the powerful poison tetrodotoxin; these salamanders tend to be slow-moving and have bright warning coloration to advertise their toxicity. Salamanders typically lay eggs in water and have aquatic larvae, but great variation occurs in their lifecycles. Some species in harsh environments reproduce while still in ...
Spotted salamanders do produce poisonous skin secretions, which allow them to taste bad to predators. For a human, these skin secretions are more irritating and would not kill an adult or even a ...
Normally fish would eat salamander eggs, but in the vernal pools the eggs are safe. The hatched salamanders can also thrive. [5] [3] Salamanders are explosive spawners and the females lay thousands of eggs which they attach to sticks below the water. In addition to the loss of the hatching larvae to predators, the larger larvae engage in ...
These salamanders are mostly terrestrial and eat invertebrates, although some species are known to eat smaller salamanders. They can be found throughout the US and some areas of Canada in damp forests or plains. This family contains some of the largest terrestrial salamanders in the world, the tiger salamander and the coastal giant salamander ...
Bird eggs are coloured and patterned, seemingly primarily for camouflage to deceive the eyes of egg predators; for example, Eurasian curlews nest among tall grasses and have eggs that are green and spotted like their background, as well as being defended by the adults; in contrast, the eggs of little ringed plovers, laid on pebbly beaches, are ...