Ornithonyssus

• Also called the Northern mite or Northern feather mite

• Closely related to Dermanyssus

• Hairy

• Spends entire life cycle on the host

• Occurs in caged birds and poultry

• Causes feathers to become matted and severe scabbing can develop
  • Scabs particularly seen around the vent

• Decreases egg production

• Grey or black discolouration of feathers when large numbers of mites are present