@Renata posted a white witch observation to iNaturalist (the 152nd) for a moth in Manaus, on Dec 5, 2019. She notes that this is the second she has seen this year (uncommon luck). The first observation was from four months earlier, Aug 4. This suggests two possibilities. 1) white witches emerge as a synchronized brood before August, and individuals of that brood live as long as 4 months, or 2) white witches emerge over a period of several months, thus are not closely synchronized with respect to local seasonal conditions.
A second point: there are 6 ww observations on iNaturalist within a few km of Manaus. Either the iNaturalist members in the area are particularly diligent, or ww's are uncommonly abundant locally. The graph here shows average monthly precipitation in Manaus, and the months in which iNat observations were made. Not obvious that there is a seasonal pattern, though the data are scant. It would be additionally helpful to estimate the ages of the moths, but the photo quality makes that difficult.
A second point: there are 6 ww observations on iNaturalist within a few km of Manaus. Either the iNaturalist members in the area are particularly diligent, or ww's are uncommonly abundant locally. The graph here shows average monthly precipitation in Manaus, and the months in which iNat observations were made. Not obvious that there is a seasonal pattern, though the data are scant. It would be additionally helpful to estimate the ages of the moths, but the photo quality makes that difficult.