caa a22 4500 605542546 CHVBK 20210128100922.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10071-015-0874-0 doi (NATIONALLICENCE)springer-10.1007/s10071-015-0874-0 Visual illusions in predator-prey interactions: birds find moving patterned prey harder to catch [Elektronische Daten] [Liisa Hämäläinen, Janne Valkonen, Johanna Mappes, Bibiana Rojas] Several antipredator strategies are related to prey colouration. Some colour patterns can create visual illusions during movement (such as motion dazzle), making it difficult for a predator to capture moving prey successfully. Experimental evidence about motion dazzle, however, is still very scarce and comes only from studies using human predators capturing moving prey items in computer games. We tested a motion dazzle effect using for the first time natural predators (wild great tits, Parus major). We used artificial prey items bearing three different colour patterns: uniform brown (control), black with elongated yellow pattern and black with interrupted yellow pattern. The last two resembled colour patterns of the aposematic, polymorphic dart-poison frog Dendrobates tinctorius. We specifically tested whether an elongated colour pattern could create visual illusions when combined with straight movement. Our results, however, do not support this hypothesis. We found no differences in the number of successful attacks towards prey items with different patterns (elongated/interrupted) moving linearly. Nevertheless, both prey types were significantly more difficult to catch compared to the uniform brown prey, indicating that both colour patterns could provide some benefit for a moving individual. Surprisingly, no effect of background (complex vs. plain) was found. This is the first experiment with moving prey showing that some colour patterns can affect avian predators' ability to capture moving prey, but the mechanisms lowering the capture rate are still poorly understood. Springer-Verlag Berlin Heidelberg, 2015 Aposematism nationallicence Colour polymorphism nationallicence Motion dazzle nationallicence Predator-prey interactions nationallicence Visual illusions nationallicence Hämäläinen Liisa Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Valkonen Janne Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Mappes Johanna Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Rojas Bibiana Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Animal Cognition Springer Berlin Heidelberg 18/5(2015-09-01), 1059-1068 1435-9448 18:5<1059 2015 18 10071 https://doi.org/10.1007/s10071-015-0874-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-015-0874-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hämäläinen Liisa Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Valkonen Janne Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Mappes Johanna Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Rojas Bibiana Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/5(2015-09-01), 1059-1068 1435-9448 18:5<1059 2015 18 10071