Hey group, I have two iggies, both about 3 years old. They were given to me when they were young and always housed in the same enclosure. One male and the other believed to be a female. Up to now I have'nt had any problems with them being housed together. Over the past few weeks the presumed female started acting like the known male. Head bobbing, starting fights, etc. Ofcourse they will be separated. My question is why just now does the other start being a male? When the other one(I know he's male as hes been to the vet with a knee injury) has had male behavior all a long.

Is this learned behavior or strange iguana puberty. They are the same age though.
Is this learned behavior or strange iguana puberty. They are the sameage though.

Reptiles can mature at different rates.
Hey group, I have two iggies, both about 3 years old. They weregiven to me when they were young ... together. Over the past few weeks the presumed female started acting like the known male. Head bobbing,starting fights, etc.

Ig could still be a female. Females are also known to bob and have been known to act aggressively towards their mates.
One breeder's page says if you are going to breed igs then pair the female with a male of a similar size to avoid the male hurting the female too much during mating, but also don't pair a female with a male that's much smaller than she is because the female could injure or even kill the male if she takes exception to his romantic advances.
She(?) is a little bigger than him. In both length and weight. She(?) is currently 35" total length to his 30".
Most of the time the get along or rather tolerate each other. Their current enclosure is a 75 gallon tank extended all the way up to the ceiling. I'm having a bit of trouble keeping their humidity up, arid Denver.
Currently I just mist them up a alot with a squirt bottle and I'm experimenting with a humidifier.
When do iguanas typically hit 'puberty'?
She(?) is a little bigger than him. In both length and weight. She(?)is currently 35" total length to his 30". When do iguanas typically hit 'puberty'?

I don't know to be honest. Harvey could have been about 6 months old when I got him two years ago. He went through his first breeding season some time last year. I had him with me on a daytrip to Galway (about 2 hours by train) and in the sunshine I suddenly noticed he had breeding season oranges. Of course in the wild at age 2.5 and 2 and 1/2ft long Harvey wouldn't get a look in edgeways with the ladeez as much as he may want to because igs aren't considered fully grown until they reach age three and the average for a male iguana is 6 ft long
Hmm. Interesting. I have noticed the known male getting more and more rust coloring, especially around his head and dewlap. Also in his spikes. The rest is nice looking greens and pastel blues.
I will have to take pictures soon.