Where do northern fowl mites (Ornithonyssus sylviarum) deposit their eggs on a laying hen to ensure survival?

The Northern Fowl Mite (*Ornithonyssus sylviarum*) is a parasitic threat because it completes its entire 7-day life cycle on the host chicken. To ensure the survival of their offspring, female mites deposit their eggs in specialized micro-climates on the bird's body. They select the base of the feather shafts in the warm, humid vent fluff, abdominal region, and sometimes under the wings. The dense feathers in these areas provide protection from cold drafts, and the close proximity to the hen's skin ensures a constant temperature of around $38^circ C$ and immediate access to blood meals upon hatching. The accumulation of eggs, larvae, and adult mites creates a dirty, matted appearance on the feathers, often confused with feces. Treating these zones requires directed spray of systemic antiparasitics. Farmers can study ectoparasite control in the Poultry Encyclopedia, buy premium miticides and backpack sprayers on Poultry Plaza, monitor the economic cost of drops in lay on Poultry Rates, and list clean, treated flocks on Murghi Mandi.