Warbler I.D. please

[Sylvia and Mick]

This Warbler has been in the trees outside my house for the past 2 days - managed to get some shots today - had an unusual call
(intermittent 'dweep - dweep' with no other call, almost sparrow like)  eye stripe was noticably yellow when viewed - probably just a chiffchaff ............I'm not very good at warbler ID.

[Damian]

Yes it's a Chiffchaff

Damian

[Sylvia and Mick]

Thanks for taking the time to reply - the 'Chiffchaff' was still present today............I am still bemused by its strange call........hope it hasn't got a case of 'avian flu'. 
Many regards.

[IanF]

Chiffchaff do have a variety of odd calls this time of the year as they're migrating for Winter, likewise when they first arrive back to breed in the Spring. I think it's only when breeding they make the normal 'chiff-chaff' call.

It's a good bird to get in the garden.