A senior inside a colony that never slows down
Mourning geckos live communally and reproduce constantly, which creates a peculiar senior problem: the colony around an old female never ages with her. While she slows, the enclosure fills with her own younger daughters and granddaughters — faster, bolder, and quicker to every feeding cup. Her care needs change less because mourning gecko husbandry changes than because her position inside that busy society does.
Her own changes are the familiar small-gecko ones, at miniature scale. Grip weakens as sheds leave residue on tiny toes. Hunting loses its snap. Colour sits mottled and subdued for longer, and she chooses lower, more sheltered resting spots than the exposed glass positions youngsters favour. Because she weighs so little, condition loss that would be invisible in a larger lizard is a significant fraction of her body.
Feeding stations are the whole game
Access decides whether a senior mourning gecko eats. One feeding cup in a colony is effectively owned by the boldest youngsters, so add stations — several small cups of fruit-based gecko diet placed at different heights and in different corners, with at least one low and close to your old female's chosen shelter. She should be able to feed without travelling far or displacing a rival.
Keep offering tiny live prey for those who hunt, but do not rely on it for her nutrition; a slow hunter in a tank of fast ones catches leftovers. The prepared diet, properly formulated and refreshed on schedule, is the senior's reliable ration. Check the low cup she uses for actual lick marks and leftovers, because in colony keeping, food offered and food eaten by the right gecko are very different facts.
Eggs, condition, and the cost of a lifetime of laying
Mourning geckos reproduce by parthenogenesis, and females lay on and off through much of adult life. An ageing female may continue producing eggs while her reserves quietly run down, and the signs are written on her body: thinning at the tail base, hip bones becoming visible, and a jawline that loses its firm edge. Calcium demand is relentless in a laying animal, so dietary minerals and appropriate lighting — whatever regime your colony is established under — must not lapse for the oldest member even as her appetite shrinks.
A female who becomes egg-bound, strains, goes off food with a swollen abdomen, or shows a soft or trembling jaw needs a vet urgently; at her size these problems move fast. Otherwise, gentle observation is the tool — she is far too small and stress-prone for routine handling, and weighing usually means coaxing her into a clear container on the scales rather than holding her.
Sheds, grip, and safe low routes
Keep humidity reliably high with a persistently damp hide layer, because retained shed on a mourning gecko's toes steals the climbing ability she needs to reach food and escape colony squabbles. Cork pieces, broad leaves, and textured tubes at low and middle heights give her walkable routes that do not depend on perfect glass grip, and deep leaf litter cushions the falls that happen anyway.
Keep the enclosure's layout stable. A senior who has memorised her routes suffers most from redecoration, and in a colony terrarium where plants get trimmed and cups get moved, her corner should be the last thing rearranged.
Knowing her baseline is what makes change visible
In a tank of near-identical tiny geckos, an individual's decline is almost undetectable without records — which female thinned, which one stopped laying, which one moved downstairs permanently. Noting her resting spot, condition, and laying rhythm in KinsLe's Pet Passport gives her a documented baseline, so the slow changes of old age register as changes instead of blending into the colony.