The Northern Fowl Mite (Ornithonyssus sylviarum) is very similar to the Tropical Fowl Mite (Ornithonyssus bursa), but can be distinguished by the dorsal plate. The posterior end of this plate tapers acutely in the Northern Fowl Mite but more evenly in the Tropical Fowl Mite. Furthermore, three pairs of setae (bristles) are present on the sternal plate in Tropical Fowl Mites but only two pairs in Northern Fowl Mites (see illustrations in online Featured Creatures species account by Denmark and Cromroy (2012)).
- Denmark, H.A. and H.L. Comroy. 2003/revised 2012. Tropical Fowl Mite (Ornithonyssus bursa). Featured Creatures Series, Publication EENY-297 (revised from original version published as DPI Entomology Circular 299; updated for Featured Creatures). University of Florida Institute of Food and Agricultural Sciences, Gainesville, Florida.
- Kaufman, P.E., P. G. Koehler, J. F. Butler, and H. L. Cromroy.1998/revised 2007. Northern Fowl Mite. University of Florida Institute of Food and Agricultural Sciences Extension Publication ENY-286, University of Florida, Gainesville.
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