Scottish Birds 36:4 (2016) p326-328
Linnet and Twite are small, seeding-eating finches which occur widely in Scotland through the year. For those of us who live away from the Highlands and Islands, the best chance of seeing Twite is along the coast in winter. This short article gives some hints of how to tell these two sometimes nondescript species apart.
Clyde Birds 17 (2007) p120-125