July 2019: Saskya has the pleasure of visiting the Indian Institute of Science, Centre for Ecological Research ( In addition to presenting a research seminar:( ) I got to see fig wasps in action on a clump of figs on one of the 49 fig trees on the campus.

May 2019: After an exceptionally bad year for the host butterfly, Melitaea cinxia, in Åland, Finland, we were afraid that the parasitoid Cotesia melitaearum might not show up in the spring survey this year, but it came through!

Four Cotesia melitaearum parasitoid cocoons from a single overwintering Melitaea cinxia caterpillar.

August 2018: Our paper on the decline of a hyperparasioid due to increased host butterfly population fluctuation is out: 
Nair, A., Nonaka , E., van Nouhuys, S.  2018
Increased fluctuation in a butterfly metapopulation leads to diploid males and decline of a hyperparasitoid
Proceedings of the Royal Society B. Download here

 April 2018: Kahilainen, A., van Nouhuys, S., Schulz, T. & Saastamoinen, M. 2018
Metapopulation dynamics in a changing climate: Increasing spatial synchrony in weather conditions drives metapopulation synchrony of a butterfly inhabiting a fragmented landscape.
Global Change Biology. Download here

March 2018: Reudler J. H., van Nouhuys, S.  2018The roles of foraging environment, host species and host diet for a generalist pupal parasitoid. Entomologia Experimentalis et Applicata 10.1111/eea.12657. Download here