Well, did they count the birds and one is missing?
Certainly does not look like a bird strike, even less a drone strike. Despite the opinion of "Aviation commentator Peter Clark" (in the nzherald story), based on that picture I am willing to bet that this dome collapsed spontaneously.
No traces, no apparent impact point, paint missing only on the places where it is bent, no hail traces, almost exactly symmetric collapse... This happened all by itself, no reason to suspect the feathered colleagues.
Maybe they chose the budget "made from re-used plastic bottles" spare part provider for the plastic caps on their 757s
