The short answer for a red-eyed tree frog
A red-eyed tree frog can have a silkworm, a small soft feeder insect, or a single waxworm as a treat, offered about once a week at most and only at night. This frog sleeps flattened against a leaf all day and hunts after dark, so a treat presented in daylight is simply missed. Treat insects for a red-eyed tree frog should be small enough to swallow easily, dusted like its staple feeders, and counted inside the night's feed rather than added on top of a full cricket ration.
Why timing is part of the treat
A red-eyed tree frog's whole feeding life runs on a night shift: it wakes at dusk, moves to a hunting perch, and snaps at insects moving through the leaves. Offering a treat in rhythm with that cycle lets a red-eyed tree frog hunt naturally, tracking a silkworm along a leaf with the slow stalk this species uses. Daylight treat attempts usually fail and can stress the frog, which will stay pressed to its leaf and ignore food entirely. For this species, when you offer matters almost as much as what you offer, and keepers who feed at lights-out see the treats taken within minutes.
Treats that suit a red-eyed tree frog
A silkworm is an ideal red-eyed tree frog treat: soft, slow, and easy to place on a broad leaf within striking range. One waxworm makes a rich, occasional prize, and a small black soldier fly, the flying form of the larvae, can trigger a lovely aerial snap from a red-eyed tree frog perched above. Tiny hornworms suit larger individuals. Avoid anything too large, hard-shelled, or wild-caught for a red-eyed tree frog, whose skin and stomach are both delicate, and never offer fireflies, which are toxic to small frogs even though they look like perfect night prey.
How often a red-eyed tree frog can have them
Keep a red-eyed tree frog's treat to roughly one feed a week, with one or two treat insects inside that feed and staple crickets or small roaches making up the rest of its meals. Waxworms sit at the rarest end even within treat feeds, perhaps every other treat night, because a red-eyed tree frog that develops a waxworm preference may snub the leaner insects it needs nightly. Juvenile red-eyed tree frogs feed more frequently as they grow, but the treat share should stay just as small, with dusted staples doing the growing work.
Watch-outs for a red-eyed tree frog
Observe a red-eyed tree frog at night rather than judging by day: a healthy frog wakes with bright colour, clear red eyes, and a purposeful move to its perch. A red-eyed tree frog that stays dull-coloured after dark, leaves treat and staple insects untouched across several nights, or shows spots or dull patches on its skin needs an amphibian vet, because skin and appetite changes are early warnings in frogs. Handle this species as little as possible around treat time too, since a red-eyed tree frog absorbs substances through its skin and lotions or salts on hands can harm it.
Keeping night feeds straight between keepers
A red-eyed tree frog is fed after lights-out, often by whichever keeper is still awake, which makes its treat nights easy to duplicate or forget. A shared log written for the night shift solves it. In KinsLe Care Teams, the night's feeder can tick the feed off and note the treat insect, so this tree frog's once-a-week waxworm is not repeated by a second helpful person an hour later.