File:Bumblebee-mimicking hoverfly (Criorhina ranunculi), Parc de Woluwé, Brussels (36472768703).jpg

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In early 2017, I have been following a population of this rare hoverfly in the "Parc de Woluwé", an urban landscape parc in the eastern part of the Brussels region.

All observations took place 9 April and 10 May 2017. Most individuals that I found were either resting on the base of old or diseased trees, or flying low above ground around such trees. Copula and an egg-laying female were already observed on 9 April (see <a href="https://observations.be/waarneming/view/136540688" rel="nofollow">observations.be/waarneming/view/136540688</a>); hence it is likely that I missed the start of the flight season by several weeks.

Adult seem to have a preference for maple trees (Acer pseudoplatanus), but horse chestnut (Aesculus hippocastani), elm (Ulmus sp.) and other tree species were also visited frequently. Despite the presence of numerous (presumably suitable) beech (Fagus sylvatica) trees in the parc, I never noticed any individual on a beech tree.

In September 2017, the Woluwé Parc is subject to an intense sanitary tree cutting activity, which (not surprisingly) affects many of the trees occupied by C. ranunculi. It remains to be seen next year to what extent the population will be affected by the removal of a major part of its breeding habitat.
Date
Source Bumblebee-mimicking hoverfly (Criorhina ranunculi), Parc de Woluwé, Brussels
Author Frank Vassen from Brussels, Belgium
Camera location50° 49′ 47.23″ N, 4° 25′ 28.53″ E Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This image was originally posted to Flickr by Frank.Vassen at https://flickr.com/photos/42244964@N03/36472768703 (archive). It was reviewed on 18 December 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

18 December 2018

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current18:07, 16 December 2018Thumbnail for version as of 18:07, 16 December 20182,655 × 1,872 (2.39 MB)Rudolphous (talk | contribs)Transferred from Flickr via #flickr2commons

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