Sylvia undata or the Dartford Warbler is a small, dark brown long-tailed bird with a distinctive red ring around it's eye. It is found in lowland heaths south of the Thames among other locations in the UK. The Dartford warbler was first recognised in 1773 by John Latham an ornithologist who was given a pair that had been shot on Bexleyheath. In 1783 he included the warbler in his 'A general Synopsis of Birds'. Available as a mug at Amazon and other retailers! Just in case you really love birds there is a t-shirt too! (Who knew this little bird was so popular to have its own range of merchandise!) Amazon- Dartford Warbler Half Pint Mug Ninebarrow- Navy Dartford Warbler Navy T-shirt alderneywildlife.org Habitat preferences of the Dartford Warbler on Aldeney Wikipedia- Dartford warbler