One iguana, one territory
A green iguana is not a group animal wearing a lizard costume. In the wild these large herbivores spread out through the treetops, and an adult claims its basking and feeding space against rivals. Put two in an enclosure — however generous it looks to human eyes — and you have built an arena, not a home. Males are the most dangerous pairing, especially in breeding season when hormones sharpen aggression, but two females or a male and female kept together full-time also fight, intimidate, and compete. The loser often does not look beaten at first; it simply stops basking properly, eats less, and slowly declines.
Size turns dominance into injury
A scuffle between small lizards and a scuffle between animals that can grow longer than a person is tall are different categories of problem. Green iguanas bite hard enough to need stitches, whip with muscular tails, and rake with sharp claws. A dominant iguana also controls the two resources that keep an iguana alive: the hottest basking spot, which it needs to digest its leafy food, and first access to that food. The subordinate animal runs cooler, digests worse, and is chased from the greens — a combination that undermines bone health and growth in a young iguana within a single season.
What solo housing actually requires
Planning for one iguana means planning for the adult, not the charming hatchling in the shop. An adult needs a room-sized enclosure with a strong climbing structure, a hot basking zone, high humidity, and space to turn its full length without bending around a tankmate. That footprint is the real reason cohabitation tempts people — two iguanas in one build looks cheaper than two builds — but it is a saving that gets repaid in vet visits and stunted animals. If a household genuinely wants two iguanas, it needs two complete enclosures, ideally in different rooms so neither animal spends its day staring at a rival. Budget honestly for that scale before the purchase, because an iguana that outgrows a too-small enclosure cannot be helped by adding a companion — it can only be helped by the space it needed from the start.
Breeding season changes a solo iguana too
Even a lone male iguana can become territorial and unpredictable for weeks during breeding season, charging the glass, refusing food, and objecting to hands that were welcome a month earlier. That is another reason the whole household, not just the main keeper, needs the same handling plan and the same respect for the enclosure as the iguana's private ground. Never let visiting children or a second iguana 'meet' the resident to see how it goes; iguana introductions are exactly how the worst bites happen.
One Territory, Understood by the Whole Household
An animal this large and long-lived is cared for by a household, not a person, and mixed messages — one member offering it a tankmate, another hand-feeding it through the bars — are how accidents happen. Family Sharing through KinsLe lets that keeper pass profile access for the solo iguana to the relatives selected at home, widening who can open its profile without widening the enclosure to a second animal.