Unmistakeably a Wiliam Lionel Wyllie product. Nobody but him would have the stamina to paint such a number of equally small birds. On second thought, I would amend that to admit that Dutch contemporary Maarten Platje could indeed augment the flock if he wanted too - he has even more tiny details in his paintings.
I guess that such a number of small details increases the feeling of space, but in my eyes it also stiffens things up a little. I cannot say that Wyllie's seas "moves" as does, for example, those of Thomas Somerscales. Great painting though, and so are the works of above mentioned Maarten Platje.