My name is Elin Sild and I come from Tartu University in Estonia. I defended my PhD thesis ”Oxidative defences in immunoecological context: validation and application of assays for nitric oxide production and oxidative burst in a wild passerine” last year. My supervisor for both my master and PhD thesis has been excellent prof Peeter Hörak. After defending I worked as a researcher in Tartu University and now I have started to work here, in Lund University as a researcher. My main research interests are in the fields of immunoecology, oxidative stress, carotenoid signals and I have mainly been working with passerine birds. Here in Lund University I will be part of the project studing the effects of oxidative stress on learning ability of Zebrafinches.