System macOS Sequoia 15.3, game version 1112.519.1220
On lots that are near where the game spawns butterflies, they fly through the lot (house) day and night. It happens in all worlds across all sa...
Ideas
Do you have Island living? The reason I ask is I recently completed the conservation career and cleared up Mua Pel'am in Sulani and for several in game weeks after I had butterflies inside my houses in all worlds. I figured it was a bug. No issues with bird though like seen in the pictures above (unless I build really high up).