How visible is this species?
Indian Ornamentals are arboreal and may spend long periods inside a webbed retreat around cork or another raised surface. A secure Poecilotheria regalis may be visible at the entrance but still choose to stay hidden for much of the day.
Do not judge the welfare of Poecilotheria regalis by how often the spider is on display. A secure retreat is part of good husbandry even if it means seeing the animal less often.
Life stage
With Poecilotheria regalis, young Indian Ornamentals and recently rehoused spiders often hide more than settled adults. Premoult can also keep an Indian Ornamental out of sight for an extended period.
With Poecilotheria regalis, a sudden change in visibility is more useful than a simple count of how many hours the spider spends outside its retreat.
Enclosure design
Give Poecilotheria regalis a retreat that suits its arboreal lifestyle and position routine care items so you do not have to disturb that retreat for every water change or feeding.
A display enclosure for Indian Ornamentals can still look attractive, but with Poecilotheria regalis, husbandry comes first. A spider that feels secure is often easier to observe over the long term.
Do not disturb a hidden spider
Do not dig out or uncover an Indian Ornamental simply to make it visible. With Poecilotheria regalis, hiding can be linked to normal retreat use, premoult or recent disturbance.
For Poecilotheria regalis, leave established burrows and webbed retreats intact unless there is a genuine enclosure problem that requires intervention.
When a change matters
If a normally visible Indian Ornamental suddenly disappears, check water, temperature, recent disturbance and premoult signs before changing the Poecilotheria regalis enclosure.
If Poecilotheria regalis is otherwise well and the enclosure is sound, give the spider time. Visibility by itself is a poor measure of health.