It’s a warm summer evening, and you’re out for a twilight walk. Suddenly, you spot a pair of bright eyes in the undergrowth. You freeze. A coyote steps out into the silence, bushy-tailed, followed by – yes! – three young pups. Quick as lightning, you whip out your phone and snap a photo. Alerted, they turn and swiftly vanish to hunt their dinner – and you upload the shot and location to a crowd-sourcing nature app, to feed into a study. Another triumph for community science! Sounds futuristic? Actually, it could be you this summer, if you’re willing. The Grit …