During the fourth annual survey week in October, 659 participants reported 255 grey squirrel and 510 red squirrel sightings - more than triple the number reported in a typical week.The data influences conservation work carried out by Saving Scotland's Red Squirrels, a project led by the Scottish Wildlife Trust that has been working to save the species for the last 14 years.Vanessa Fawcett from the Red Squirrel Survival Trust told BBC Scotland that gardeners can help with the conservation efforts.She said: "We are encouraging gardeners who live in red areas or areas adjacent to red areas to start to feed the reds as their numbers grow [and] to start to grow the food that will benefit and supplement the existing food sources for our red squirrels."In the south of Scotland, a mix of the two species remains, but volunteers are working to keep numbers of grey squirrels low."