Their call is a simple 'tswit, tswit, tswit' or 'weet-a-weet' and the song is a prolonged sweet twittering, that almost sounds like a sparrow.
Swallows must be amongst the most popular of birds and can be seen between March- October and then they migrate to a warmer climate for the winter. They breed here in the UK in open habitats and both adults build a nest from mud and plant fibres against a beam or shelf in a building or a ledge of a cliff. Existing nests are often reused and refurbished. They are commonly seen on farmland and can also be found in both upland and lowland habitats where there are plenty of insects.
Haith's supply The ceramic Swallow nest and if used they’ll probably come back every year, imagine that! These nesting aids are installed singly, although Swallows are sociable birds, the nest should be placed no closer than 1 metre apart. Place as high up as possible, leaving 10cm of headroom.
Over the last 3 decades the numbers have fluctuated in the UK, this could be to climate change and reduced nesting sites which puts them on the amber list of species of conservation concern. As aforementioned, swallows are aerial feeders – which means we can’t provide supplementary bird food for them. We can, however, do things to encourage a healthy environment for invertebrates, such as constructing a pond in the garden. The insects will be drawn to the water and the swallows may soon be seen swooping across the pond for an aerial feast.