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*Grey or black discolouration of feathers when large numbers of mites are present[[Category:Non-Burrowing_Mites]][[Category:Poultry]]
*Grey or black discolouration of feathers when large numbers of mites are present[[Category:Non-Burrowing_Mites]][[Category:Poultry]]
[[Category:To_Do_-_Parasites]]
[[Category:To_Do_-_AimeeHicks]]