Week in wildlife – in pictures: geese on parade, a radioactive rhino and a lovestruck eagle | Environment
A sedated rhinoceros lies unconscious as scientists inject radioactive material into its horns, in Mokopane, South Africa. The isotopes make it more difficult for poachers to smuggle the horns through airport security, as well as rendering the horns unfit for human consumption, without harming the rhino or the environment
Photograph: Emmanuel Croset/AFP/Getty Images
