Red mites by the seasons
Red mite populations tend to be higher in winter and lower in summer. However in Denmark and Italy, populations tend to be higher in late summer and researchers found that was linked to temperature and humidity. Researchers in Sweden found that mites do not thrive at low relative humidity, or at extreme temperatures (more than 45°C and -20°C were found to be lethal).
In the same study, female red mites laid eggs at temperatures between 5°C and 45°C with the highest numbers laid at 20°C and 70% relative humidity, but development to larvae and protonymphs was only observed at temperatures ranging from 20-25°C.
Another nasty is the depluming mite ( Cnemidocoptes gallinae) which makes a bird very itchy and causes it to rip out its feathers. It’s particularly prevalent in spring and summer, and may disappear in autumn.