Zoologger: The lizard that changes its intercourse to accommodate the weather

Zoologger: The lizard that changes its intercourse to accommodate the weather

(Image: Arthur Georges)

Zoologger is our regular line highlighting extraordinary pets – sugardaddie and occasionally other organisms – from around the entire world

Species: The main bearded dragon (Pogona vitticeps)Habitat: Arid woodlands and deserts in Central Australia

If you can’t stay the warmth, change sex. Male lizards from Australia become super-fecund females in hot weather.


Rising conditions may lead to an intercourse change avalanche that pushes populations – and perhaps the species that are entire towards a culture without males.

An embryo to develop as either a male or a female for some reptiles, such as many snakes and lizards, sex chromosomes trigger. For other individuals, including crocodiles, alligators and marine turtles, intercourse is dependent upon heat, with extremes generally ultimately causing more females, possibly by inhibiting male genes.

Bearded dragons reveal a 3rd means – a type of evolutionary change involving the two.

Like us, they will have sex chromosomes. A female for them it’s a Z and a W. Having ZZ chromosomes normally makes a male, and ZW. However if male eggs are subjected to conditions over 32 °C, this logic gets overridden. And even though their chromosomes are telling them become male, heat makes many ZZ embryos grow up as females.

We knew this from lab experiments, however it ended up beingn’t clear whether it took place in the crazy or what impact it had.

“No one knew whether this is planning to donate to the populace, or it gets hot, ” says Clare Holleley from the University of Canberra, Australia if it was just some freaky weird thing that happens when. Continue reading

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