Ornithonyssus sylviarum (also known as the northern fowl mite) is a haematophagous ectoparasite of poultry.

The main nesting sites are generally in a close proximity to poultry coops.

This blood-feeding parasite is broadly distributed, and has been reported on 72 host species of North American birds in 26 families.

[3][4] The spread of these mites are mainly because they have the ability to hide in cracks or wild birds nests.

They have a high range of widespread in places like North America, Brazil, Australia, and China.”