Barn Swallow

The Barn Swallow (Hirundo rustica) is the most widespread species of swallow in the world,  It is a distinctive passerine bird with blue upperparts, a long, deeply forked tail and curved, pointed wings. It is found in Europe, Asia, Africa and the Americas.In Anglophone Europe it is just called the Swallow; in Northern Europe it is the only common species called a "swallow" rather than a "martin".
The Barn Swallow is a bird of open country which normally uses man-made structures to breed and consequently has spread with human expansion. It builds a cupnest from mud pellets in barns or similar structures and feeds on insects caught in flight