アカマダラハナムグリのハチクマ巣利用

概要

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Anthracophora rusticola Burmeister is a scarabaed beetle threatened about its decline in Japan. Recently, the founding of larvae or pupae of the beetle from the nest of raptors, especially Honey Buzzard Pernis apivorus Taczanowski, have been repeatedly reported. These founding imply that the beetle would specifically breed in the raptor's nest and that the decline of the beetle, might be caused by the reduction of the breeding of raptors in Japan. In this study, we surveyed two nests of Honey Buzzard to clarify the nest utilization pattern of the beetle. One of them had been confirmed to be annually used by raptors for their breeding, and the other seemed not to be used by raptors recently. One dead body of adult and 23 cocoon shells of the beetle were discovered from the former nest. All cocoon shells were found from lower part of the nest where was relatively dry compare to upper part. None was found from the latter nest. We discussed breeding pattern of beetles on raptors nests.
2006-06-25