Well, certainly not with the 45mm, a 90mm equiv the bird would be a dot. But yeah I think M43 could with its 90-250 and four thirds adapter, or some other super telephoto option. Certainly the Nikon wouldn't do that with its available kit, regardless of its AF quality it has no lens with the right reach. Its certainly not going to fill the frame with a bird at its 30-110 or 10-100 (+2.7x crop), that is clearly the work of a super telephoto ala 400mm equiv minimum. I suppose you could attach a nikon AF-s lens, not sure how useful that is considering how little of the glass is used.
I don't know how you prepared for the shot, do you chase the birds with tracking or do you shoot them with single shots?