Night feeding is where it shows
A green tree frog with early dental trouble gives the game away after dark, when this nocturnal hunter normally comes down from its perch to work the floor and lower leaves for crickets and moths. The early pattern is a lunge that lands short, prey mouthed and then spat back out, or a frog that sits facing a cricket without committing to the strike it would have made a week ago. Because a green tree frog may skip a night for other reasons, the sign that matters is repetition: the same clumsy feeding across two or three nights, in a frog that still positions itself to hunt.
Reading the jaw of a frog that yawns
A green tree frog often yawns or adjusts its jaw shortly after waking at dusk, and that moment is your best viewing window. Watch for a mouth line that settles unevenly, one corner sitting lower or puffier than the other, pale or reddened patches along the lip, or a jaw that takes several attempts to close fully after the yawn. Swelling anywhere along the jaw of a green tree frog stands out against the normally smooth, clean profile of the head. A frog that rubs its face against a leaf or the glass after failed strikes is adding another hint that the mouth itself feels wrong.
Why small mouth changes stop a tree frog hunting
A green tree frog holds prey with small upper teeth and a sticky tongue, then works the food back with movements of the jaw and eyes. Discomfort anywhere in that sequence breaks it: the tongue lands, but the grip fails, and the cricket escapes or is released. This frog also sings and competes at night, so a mouth problem can show socially as well, with a previously regular caller going quiet while still looking bright. The feeding change comes first and is the one to trust, because a green tree frog with a sore mouth conserves effort quickly and may simply stop descending to hunt, which owners misread as the frog becoming shy.
Observing without wrecking the night routine
A green tree frog should be checked under the low light it normally hunts in, not hauled out under a bright lamp. Count strikes and swallows during one normal feeding, note which side the prey escapes from, and compare the jaw line in a through-glass photo with an older picture of the same frog. Keep hands off unless absolutely necessary, and if the frog must be moved, use wet, powder-free gloved hands so the skin is not harmed. Leave humidity and the night temperature drop as they are while you observe, since a dry or chilly night suppresses hunting and can imitate the very signs you are watching for.
When a green tree frog needs a vet soon
A green tree frog that has not swallowed food across several nights, shows growing jaw swelling, sits with the mouth ajar, or is found on the floor weak and uninterested in climbing needs an amphibian-aware vet soon. Mouth changes paired with dull skin colour that does not brighten at night, or with the frog soaking for unusually long periods, should also prompt a call rather than more home watching. Bring the night-by-night feeding notes and photos, because this frog will look deceptively normal sitting in a carrier by day. Keeping that record inside KinsLe's Pet Passport means the whole sequence travels with the frog to whichever clinic treats it.