Bird mimicking my neighbours ringtone or maybe just a bird call?

I'm going to sound crazy but i'm not, not about this anyway;
every morning when I put seeds/bread/cheese/whatever out for the birds there is always a blllb blllb
it sounds exactly like my neighbours phone
but it's a bird

In the morning I'll open the back window to mostly silence (apart from a few cars starting up) but as soon as the food goes out bllb bllb..bllb bllb