Arid climates receive very little to no rain all year round. There are very few species that thrive in the absence of water. In fact, these species usually do poorly when humidity is too high. We utilize this badge to describe species that should have bone dry substrate. 

Temperate climates are those which receive some rainfall annually. Some parts of the year may be drier, but spiders will often seek out damp locations deep in burrows during these times. These are species which should be kept with some humidity in the enclosure. Our preferred method of adding humidity is to add water to the substrate. We suggest soaking a corner, or a side of the enclosure, so that the animal has access to a dry-damp gradient. 

Tropical climates receive large amounts of rainfall. These species will do well to have substantial humidity throughout the tank. However, in the case of Avicularia, high ventilation is also very important. Substrate should never be water-logged, or with sitting water, but rather thoroughly damp. 

 

Dwarf species of tarantulas don't exceed 2-3" in max leg span

Medium sized tarantulas range between 3-5" in leg span

Large tarantulas span 6-9" in leg span. There are reports of tarantulas getting as big as 11" in leg span. This is not common. 

 

Fossorial species will dig into the ground and create burrows not much bigger than themselves. Sometimes, these burrows can reach multiple feet in length in the wild. These are species that will do best to have plenty of substrate. 

Terrestrial species are opportunistic burrowers that will take advantage of existing hideouts. They are visible more often in enclosures and don't require the depth of substrate that fossorial species do. However, it is common practice to offer a cork hide. 

Arboreal species live off the ground in trees. They require more vertical space in the enclosure. 

 

New world species can be found in the Americas. They are typically slower moving, and present less of a flight or bite risk. Newer keepers typically begin with new world species. There are some exceptions.

Old world species are found in Asia, Australia, Africa, and the Middle East. They are known for more potent venom. While not lethal, bite reports include bouts of pain, nausea, and cramps from some species. Most will prefer to flee. Use caution when working with juvenile or adult animals.