I. Feather mites - Examination Statistics
II. Examination Statistics from feather mites living in feather quills
III. Examination Statistics from quill mites

I. Feather mites - Examination Statistics

All feather samples listed in this statistic, were examined for feather mites and feather quill mites. The feather samples are very diverse in their type and scope. Examinations of moult feathers (single feathers too), the whole skin of dead birds and living birds are the basis of this statistic. The positive results are an expression of an infestation which is independent of the detected number of feather mites or of the species found. A positive result can for instance imply an infestation with 3 different species of feather mites or both the infestation with feather mites and feather quill mites. Of course a negative result of a single feather or several feathers is not the final determination of the actual contamination of the related individual. Therefore the negative results should be considered carefully, not guaranteeing that there are no mites.

Examination period: 15.12.1999 - 31.12.2009

	Results:
	- Species of birds:		772
	- Examination total:		5071		2846 positive		2225 negative
	- procentual:				56,12% positive		43,88% negative
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II. Examination Statistics from feather mites living in feather quills

As we have already pointed out in our biology chapter, the quill habitat is normally populated with the true prostigmatic quill mites and with some astigmatic feather mites. The detection of mites living in the quill is more difficult than of feather mites and one needs a trained eye, especially when low number of mites exsist. Further, an infestation is only detectable, if the feather was severed from its anchoring on the wing. Bore-holes in the quill which can probably be found by a versed investigator on live birds, more likely however on dead birds, point to mite contamination. But only an exact determination of the content of the feather-quill can give complete certainty. The reasons given are surely responsible for the delayed discovery of the feather mites.

Examination period: 15.12.1999 - 31.12.2009

results

	results:
	- species of birds:		17
	- detections:		27
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III. Examination Statistics from quill mites

Examination period: 01.06.2002 - 31.12.2009

results

	results:
	- species of birds:		155
	- detections:		438
	Download the complete statistics of results - DOWNLOAD PDF-File -

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