ID thanks to John and Jane Balaban. The Elachistidae (grass-miner moths) are small to very small moths with wingspans of 1 cm or less.

The female leaf miner moths lay their eggs one by one on the underside of citrus leaves. Some authors lump about 3,300 species in eight subfamilies here, but this arrangement almost certainly results in a massively paraphyletic and completely unnatural assemblage, united merely by symplesiomorphies retained from the first gelechioid moths. Elachista madarella. So there is a chance this identification could be wrong.

Pupation takes between six and 22 days and happens within the leaf margin. Grapefruit, lemon and lime trees are the most frequent hosts, but all citrus plants can be infested. P1170938.jpg: P1170941.jpg: 9th August 2015 - Same Moth. Grass Miner Moths (Elachistidae) Active in: Go. Their wings appear feather-like due to the fine hair covering the wings' fringes, and the hind wings can be much smaller than the front wings essentially consisting of a small strip with a wide hairy fringe. The Elachistidae (grass-miner moths) are a family of small moths in the superfamily Gelechioidea. Grass-miner Moths: EPERMENIIDAE Fringe-tufted Moths: EPIPYROPIDAE Planthopper Parasites: EREBIDAE Tropical Moths ERIOCOTTIDAE Spiny-winged Moths ETHMIIDAE Black-spotted Moths: EUPTEROTIDAE Monkey Moths EUTELIIDAE Euteliid Moths GALACTICIDAE Webworms GELECHIIDAE Twirler Moths GEOMETRIDAE Inchworms, Loopers, Emeralds, Arches GLYPHIPTERIGIDAE Sedge Moths …
Many generations are born each year. Grass Miner Moths (Elachistidae family, Gelechioidea superfamily) Grass Miner Moth (Antaeotricha genus, probably Schlaegeri species, Stenomatinae subfamily. Tiny larvae develop and mine tunnels into the leaves. It is rather hard to tell many of the Ermine moths apart.

This moth was ~5 mm long and looked like a bird dropping at first glance.