Mystery bird

[owner2]

I know this is difficult but does anyone recognise this bird?I live in Milngavie near Glasgow and twice while walking along the River Allander have briefly seen a bird about the size of a swallow.It has a white breast flies upwards very quickly,its wings are boomerang shaped and it flies down to earth again very suddenly. I have only managed to glimpse it for a few seconds. my best guess would be a sand martin although it's a bit early and they're gregarious or a sandpiper although i've never noticed large feet.any ideas anyone?

[sft42]

Given the description I would opt for the sand martin as well....BTW You live just up the road from me Owner2....I live just off Maryhill Road!!

http://www.angliacampus.com/public/pri/science/bir
ds/birds.htm Give a handy online bird identifier.

[owner2]

small world!thanks for your help.

[Cetti]

There have been quite a few sightings of House Martins that have arrived incredibly early this year, and having a very white breast with scimitar (?) wings this rather than the Sand Martin could be the mystery bird.

[del_1690]

It is a small world, Im in Clydebank!