A. gundlachi is a trunk-ground lizard, meaning it mainly lives and perches on the lower regions of large tree trunks.

[5] Preference for wide, woody vegetation helps the lizard remain hidden from predators, allows for better locomotion, and aids in scanning more area of its territory.

15 minutes before sunset, the individual approaches its sleep site, where it then lies horizontally on the leaf with its snout pointed toward the stem and remains there until dawn.

[9] The plants the lizard chooses as sleep sites are usually adult trees taller than 1 m (3.3 ft) with woody stems and branches.

[10] Field observations from 2015 to 2016 also found that females display territorial behavior as well, though with smaller home ranges than male A. gundlachi.

Females also exhibited high site fidelity with aggressive behaviors towards other A. gundlachi individuals encroaching upon that territory.

Additionally, female A. gundlachi exhibited push-up behavior, which is hypothesized to be a display of ownership of a territory.

The square wave-like motion is especially helpful for making sure the receiver can detect the display among the background foliage of the forest.

Failure to modulate according to these factors can affect the ability of the displayer to attract mates and not being able to tell rivals they occupy a given territory, which can then escalate to agonistic encounters between the two males.

[15] Adult males tend to escape by running long distances, greater than 40 cm (16 in), down a perch toward the ground or up a branch or tree trunk, while juveniles tend to escape by running shorter distances, less than 25 cm (9.8 in), usually down toward the ground to take advantage of their brown body color to hide amongst the leaf litter.

Adult males also scan the territory below their perch in a face-down survey posture more frequently than juveniles.

Rogowitz (1996) observed that A. gundlachi does not usually participate in thermoregulatory behaviors such as basking to compensate for variation in elevation in its habitat.

This lack of capacity to compensate for temperature differences from altitude means A. gundlachi is limited to its mountainous, shaded environment to survive and thrive.

Threats include climate change and severe weather events, which has been altering the habitat of A. gundlachi over the past 35 years.