Irma Wynhoff

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More than 50% of the lycaenid butterflies have an ant-associated lifestyle (myrmecophily) which may vary from coexistence to specific mutualistic or even parasitic interactions. Ant-related host-plant selection and oviposition has been observed in some myrmecophilous lycaenids. Therefore, it is remarkable that there is no evidence for this behaviour in the(More)
Obligate myrmecophilic butterfly species, such as Phengaris (Maculinea) teleius and P. nausithous, have narrow habitat requirements. Living as a caterpillar in the nests of the ant species Myrmica scabrinodis and M. rubra, respectively, they can only survive on sites with both host ants and the host plant Great Burnet Sanguisorba officinalis. After having(More)
The genus Maculinea is confined to the Palaearctic region. Four species occur from Central Europe to China and/or Japan, while M. rebeli is probably restricted to Europe. Although within many Western European countries the distribution of the species is well known, there are still many questions. The exact status of some of the species is still unclear and(More)
Details of a reintroduction of Maculinea teleius (scarce large blue butterfly) and Maculinea nausithous (dusky large blue butterfly) into a nature reserve in the Netherlands are given. The introduced population of M. teleius expanded during the first three years. In contrast, the newly established population of M. nausithous declined in the year after the(More)
The Macedonian Grayling is listed as critically endangered in the recent IUCN Red List of European butterflies because of its extreme rarity and habitat loss due to quarrying. This categorisation was, however, based on rather limited knowledge on its actual distribution, population size and habitat requirements. In 2012, we conducted field surveys to(More)
Most of the European grassland butterfly species are dependent on species rich grasslands shaped by low intensity farming. Conservation of these specialist species in agricultural landscapes relies on knowledge of their essential resources and the spatial distribution of these resources. In The Netherlands, the dusky large blue Phengaris (Maculinea)(More)
Larvae of the obligate myrmecophilous social parasite Maculinea alcon (Lepidoptera: Lycaenidae) were found exclusively using Myrmica aloba (Hymenoptera: Formicidae) ant hosts in NE-Portugal. This is the first record of the host ant usage of any Maculinea species in Portugal, and of any Maculinea using M. aloba nests. These results on such peripheral(More)
In the Netherlands, a single population of the obligate myrmecophilic butterfly Maculinea (Phengaris) teleius has survived on only 3 ha of habitat for more than 25 years, whereas at least 40 ha of habitat are thought to be required for a sustainable metapopulation. Therefore, 170 ha of farmland is being restored to wet meadows within a LIFE + project by(More)
The timing of oviposition and selection of the phenological stage of the host plant can have significant consequences for development and success of offspring, and is particularly important for endangered specialist species with rare habitats, such as Phengaris alcon butterflies. Females of this species oviposit on marsh gentians, Gentiana pneumonanthe. For(More)
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