See also Google Scholar profile

ORCID: 0020-4435-6914


18. Rönkä, K., De Pasqual, C., Mappes, J., Gordon, S. P. & Rojas, B.  2017. Colour alone matters: no predator generalisation among morphs of an aposematic moth. Animal Behaviour. In press.

17. Rojas, B.‡, Burdfield-Steel, E.‡, Pakkanen, H., Suisto, K., Maczka, M., Schulz, S. & Mappes, J. 2017. How to fight multiple enemies: target-specific chemical defences in an aposematic moth. (‡Equal contribution). Proceedings of the Royal Society B 284: 20171424. DOI: 10.1098/rspb.2017.1424 PDF

Featured in:  Inside ScienceDiscoverMagazinePhys.orgScience Daily.

16. White, T. E., Rojas, B. , Mappes, J., Rautiala, P. & Kemp, D. J. 2017. Colour and luminance contrasts predict the human detection of natural stimuli in complex visual environments. Biology Letters 13: 20170375. DOI: 10.1098/rsbl.2017.0375 PDF


15. Rojas, B. 2016. Behavioural, ecological, and evolutionary aspects of diversity in frog colour patterns. Biological Reviews. DOI: 10.1111/brv.12269 PDF


14. Stynoski, J. L.‡, Schulte, L. M.‡ & Rojas, B.‡ 2015. Poison frogs. Quick Guide. Current Biology 25:R1026–R1028.(‡ Equal contribution) PDF

13. Rojas, B. 2015. Mind the gap: treefalls as drivers of parental tradeoffs. Ecology & Evolution. DOI: 10.1002/ece3.1648 PDF

Featured in: Sciences et Avenir (France)

12. Rojas, B.‡, Gordon, S. P.‡ & Mappes, J. 2015. Frequency-dependent flight activity in the colour polymorphic wood tiger moth. Current Zoology 61:765-772. Special issue on ‘Anti-predator coloration and behavior’ (‡ Equal contribution) PDF

11. Gordon, S. P., Kokko, H., Rojas, B., Nokelainen, O. & Mappes, J. 2015. Colour polymorphism torn apart by opposing positive frequency-dependent selection, yet maintained in space. Journal of Animal Ecology. DOI: 10.1111/1365-2656.12416 PDF

Featured in a Special Virtual Issue on Evolutionary Ecology (editor’s choice) in the Journal of Animal Ecology

10. Exnerová, A., Jezová, D., Štys, P., Doktorovová, L., Rojas, B. & Mappes, J. 2015. Different reactions to aposematic prey in 2 geographically distant populations of great tits. Behavioral Ecology 26:1361-1370. DOI 10.1093/beheco/arv086 PDF

9. Hämäläinen, L. Valkonen, J., Mappes, J. & Rojas, B. 2015. Visual illusions in predator-prey interactions: birds find moving patterned prey harder to catch. Animal Cognition 18:1059-1068. DOI 10.1007/s10071-015-0874-0 PDF

8. Rojas, B., Valkonen, J. & Nokelainen, O. 2015. Aposematism. Quick Guide. Current Biology 25:R350-R351. PDF


7. Rojas, B., Rautiala, P. & Mappes, J. 2014. Differential detectability of polymorphic warning signals under varying light environments. Behavioural Processes 109(B): 164-172. Special issue on ‘Animal Cognition in the Wild’. PDF


6. Rojas, B., Devillechabrolle, J. & Endler, J. A. 2014. Paradox lost: colour pattern and movement are associated in an aposematic frog. Biology Letters 10: 20140193. PDF

Featured in:, Science News, Daily Mail (UK), Sydney Morning Herald (Australia), Nature World News, Spektrum (Germany)France Inter.

5. Rojas, B. 2014. Strange parental decisions: fathers of the dyeing poison frog deposit their tadpoles in pools occupied by large cannibals. Behavioral Ecology and Sociobiology 68:551-559. PDF

Featured in: Science Magazine, Science Daily,, Springer Select, The Scientist magazine, Der Standard (Austria), Scinexx (Germany).


4. Rojas, B. & Endler, J. A. 2013. Sexual dimorphism and intra-populational colour pattern variation in the aposematic frog Dendrobates tinctorius. Special Issue on the ‘Evolutionary Ecology of Poison Frogs’. Evolutionary Ecology 27:739-753. PDF


3. Ringler, E., Rojas, B., Ringler, M. & Hödl, W. 2012. Characterisation of nine polymorphic microsatellite loci in the dyeing poison frog Dendrobates tinctorius (Dendrobatidae), and their cross-species utility in two other dendrobatoid species. Herpetological Journal 22: 265-267. PDF

Before 2012

2. Endler, J. A. & Rojas, B. 2009. The spatial pattern of natural selection when selection depends on experience. American Naturalist 173: E62-E78. PDF

1. Rojas, B., Amézquita, A. & Delgadillo, A. 2006. Matching and symmetry in the frequency recognition curve of the poison frog Epipedobates trivittatus. Ethology 112: 564-571. PDF


Submitted / Under Review / In revision

Rönkä, K., Mappes, J., Kiviö, R., Salokannas, J., Michalis, C. & Rojas, B. Can multiple-model mimicry explain warning signal polymorphism in the wood tiger moth, Arctia plantaginis (Lepidoptera: Erebidae)?

Burdfield-Steel, E., Brain, M., Rojas, B. & Mappes, J. The price of safety: food deprivation in early life influences the efficacy of chemical defence in an aposematic moth.

Burdfield-Steel, E., Pakkanen, H., Rojas, B., Galarza, J. A. &  Mappes, J. De novo synthesis of chemical defences in an aposematic moth. Minor revisions, Journal of Insect Science.

Henze, M., Lind, O., Mappes, J., Rojas, B. & Kelber, A. An aposematic colour-polymorphic moth seen through the eyes of conspecifics and predators – sensitivity and colour discrimination in Arctia plantaginis. In revision, Functional Ecology.



Book sections

(Contact me for PDF copies!)

3. Rojas, B. & Burdfield-Steel, E. Predator Defense. 2017. In: J. Vonk & T. K. Shackelford (Eds.). Encyclopedia of Animal Cognition and Behavior. Springer International Publishing. DOI: 10.1007/978-3-319-47829-6_708-1

2. Nokelainen, O., Rojas, B., & Valkonen, J. Camouflage. 2017. In: T. K. Shackelford & V. A. Weekes-Shackelford (Eds.). Encyclopedia of Evolutionary Psychological Science. Springer International PublishingDOI:10.1007/978-3-319-16999-6_2665-1

1. Rojas, B., Nokelainen, O., & Valkonen, J. Aposematism. 2017. In: T. K. Shackelford & V. A. Weekes-Shackelford (Eds.). Encyclopedia of Evolutionary Psychological Science. Springer International Publishing. DOI:10.1007/978-3-319-16999-6_2669-1


Other publications

1. Burdfield-Steel, E. & Rojas, B. 2017. Doubling down. BIOSPHERE Magazine 29:29-36PDF