Credit: Andrew McAdam
Living beside familiar neighbours boosts a squirrel's chances of survival and successful breeding, new research shows.
The study measured year-to-year survival of North American red squirrels - and found keeping the same neighbours was so beneficial that it outweighed the negative effects of growing a year older.
However, living near genetic relatives did not improve survival rates.
The research - part of the Kluane Red Squirrel Project - used 22 years of data on squirrels in Yukon, Canada, within the traditional territory of the Champagne and Aishihik First Nations.
"These squirrels are solitary - each defending a territory with a 'midden' (food stash) at the centre - so we might assume they don't cooperate," said lead author Dr Erin Siracusa, of the Centre for Research in Animal Behaviour at the University of Exeter.