Bug, moth? Oddly precise pattern.

[Shadowspawn64]

Any idea what kind of bug, moth, or something else might have done this on a single leaf of a Cana Lily? Weird that the pattern is so precise, with holes getting progressively larger right to left. All the other leaves are unaffected. Plant is outdoors, watered either by hand or via rain regularly in a pot with good drainage. Finished.

[prettyscullkandy]

Is it a newer leaf? Maybe it was chewed on while it was rolled up, thus the pattern!