Proc. R. Soc. B 280, 20131502. (7 December 2013; Published online 23 October 2013) (doi:10.1098/rspb.2013.1502).
In the second paragraph of the ‘Material and methods’ section, the concentration of atrazine is incorrectly listed as 65.9 ± 3.48 mg l−1, mean ± s.e. The concentration should be listed as 65.9 ± 3.48 µg l−1, mean ± s.e.