One of our smallest birds in Europe is the wren (Troglodytes troglodytes). It has given its name to - and created the image of - 'wrens' as a family. (Linnaeus was Swedish...) But the European wren is actually the exception. It is the only species in the Palearctic. Virtually all wrens live in Central and South America - and they vary greatly in size, from the White-bellied wren (Uropsila leucogastra) which on average measures 10 cm and weighs 9 grams, to the Giant wren (Campylorhynchus chiapensis) which on average measures about 22 cm and weighs 50 grams. The birds in the picture are a couple of thrush wren. This species has been given its name because it resembles a thrush rather than "our" wren. The only thing they seem to have in common is the sharp bill. The size is 20 cm (8 in), i.e. twice as large (and thus one of the largest wrens).