Seasonality
for House Mouse
Where indoor food and shelter hold steady, mice breed all year, so activity isn't tied to one season. Source: https://ipm.ucanr.edu/home-and-landscape/house-mouse/ As temperatures drop, mice head for buildings; in winter they are common invaders, slipping through cracks and gaps in a home's foundation for warmth and food. Source: https://ipm.uga.edu/2019/12/23/cold-weather-critters-getting-indoors/