Sand martins returned to the cliffs of Corton as summer weather took hold of the Suffolk coast.
The migrant birds are one of the first spring birds to appear, arriving mid-March to mid-April, with some birds arriving as late as June.
Sand martins nest in colonies, some of which can contain more than 100 pairs. They excavate tunnels in sandy, dry vertical banks in sand and gravel pits, railway cuttings, riverbanks and sea-cliffs.
John Ellerby, the photographer who took the photos, said: 'An angler told me that they would be here soon in March, and about eight days ago they arrived.
'When I first arrived there were about eight a week ago and now there are about 30.'
He added: 'They are obviously feeding like mad. I think what they are doing is sorting out who goes in which nest.
'There is a lot of chasing about and then they all come back and have a conversation. It's fascinating to watch.'
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