Different characteristics between northern and southern bank vole populations in Britain, due to differences in haemoglobin types, could affect their ability to adapt to a changing climate. Research by scientists at the Institute of Animal Physiology and Genetics of the Czech Academy of Sciences has shown that northern populations of these small rodents will “borrow” a more favourable haemoglobin variant, critical for adaptation, from populations adapted to living in the warmer conditions of southern England to survive climate warming. The ability to take advantage of the diversity of traits already present in populations and adapt to climate change through them will be critical to the survival of many plant and animal species, including humans.