Animals are opportunists. One may be instinctually nocturnal, but if it learns that there is tasty food easily available during the day it will gladly change its habits. Sighting a typically nocturnal animal during the day is not necessarily a sign of its illness, but rather, it's cleverness.
Growing development has changed the habits of many wild animals. Some mid-level predators, like raccoons & fisher cats, have greatly benefitted from the development of their habitats. The large predators who used to prey upon them have been edged out, and they find an abundance of food available from their prey and from the garbage, pet food, and livestock humans make available.
I pray for the safety of your feathered family!