Wheat head blast images, copyright [Pawan Singh, CIMMYT, Mexico], and leaf rust images, copyright [VK Vikas, ICAR-Indian Agricultural Research Institute, Regional Station, Wellington, India]

Cover image ‘Ivory gull back to the colony - Amdrup land, Greenland (80°50'39" N /14°37'39" W)’, copyright Glenn YANNIC, Groupe de Recherche en Ecologie Arctique

‘Grey reef shark foraging at dawn’, copyright William Robbins, Wildlife Marine, used with kind permission of William Robbins, Wildlife Marine

‘The common, maternally-inherited endosymbiont, Cardinium heritigii, resides in the reproductive organs of the minute parasitoid wasp, Encarsia inaron. Cardinium manipulates wasp reproduction by fatally sabotaging sperm inside host testes (pictured here) so that female wasps require the symbiont to successfully reproduce’, copyright [Matthew R. Doremus, University of Arizona], used with kind permission [Matthew R. Doremus, University of Arizona]

‘This tigress fought and gained control of her mother’s territory when she was around two and half years old. Here you see her scent marking and assessing her newly acquired territory. Tigers in Ranthambore reserve are twice as inbred as those in other parts of India, and retain high frequency deleterious alleles, despite purging’, copyright [Kaushalkumar Patel, Wildlife Conservation Society-India

“Male Epipedobates anthonyi (Epibatidine poison frog) carrying tadpoles (Azuay Province, Ecuador), copyright [Luis A. Coloma, Centro Jambatu]”