The charity said it did not know how or where the birds found in Kent came to be covered in oil.

BBC: RSPCA collects oil spill birds off Kent coast

Mr. VERRALL: Yeah, that's what I normally do for, like, (unintelligible) and for birds, is like just make sure to grow extra, because you know, it's their place too.

NPR: Vegetable Gardening On A Budget

It underscores that even after 150 years of scientific study we still do not know all the birds in the Indo-Malayan region.

NPR: Brown-And-White Whistling Owl ID'd As New Species