More information about wrens
The Latin name Troglodytes troglodytes means cave dweller and may refer to the wren's habit of living in holes in walls.
The wren is found in Europe as far north as Sweden and as far south as Spain and Italy. It is a small, reddish brown bird with a distinctive cocked tail. It lives in lanes and hedges, gardens and ivy clad buildings and eats mainly insects and larvae gathered from brambles, ivy and moss.
It is said to be Britain's most common bird, although you are more likely to hear its song than to see it because of its diminutive size (it weighs a mere 8-13 grams) and secretive habits.
It does not migrate, and seems to withstand harsh winters despite its tiny size. Its large surface area relative to its body size, means the wren is in danger of losing too much body heat over night. To survive, several wrens will roost together for warmth in very cold weather, sometimes using an old nest or among heaps of stones or hollowed tree roots.
The song of the wren is a prolonged trilling warble of an astounding volume for such a small creature. Its alarm call is a harsh 'tic' also very loud, and if the wren does not like your presence it will scold you loudly.
Its pugnacious nature belies its small stature and the males will fight energetically to establish their territory.
The male wren is polygamous, and will build several nests. He then sings to lure as many females as he can to lay clutches of five or six eggs in each nest. The domed structure of the nest is among the most complex built by a European bird.
The wren flies close to the ground, in straight lines and resembles a flying walnut! They also creep about near the ground and this could have given them the common name 'titmouse'. Other common names include Jenny wren, kitty wren and bobby wren. The Old English name was wrenna, thought to derive from Old Norse rindill, which means 'little tail', from the wren's distinctive perky tail, unique among British birds.