MalaiseTrapImageNiinaKiljunen (IMAGE) University of Oulu, Finland Caption The Malaise trap is used to collect gall midges for research purposes. Image Niina Kiljunen / University of Oulu Credit Image Niina Kiljunen / University of Oulu Usage Restrictions NOTE: Media may freely use the university’s press pictures in articles related to research, teaching, learning and other activities conducted at the University of Oulu. All other use is prohibited. Please, always credit the images to: University of Oulu / photographer's name (found in the caption or in the name of the photo). License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.