If one wants to be picky, there's also some clutter in the upper-left corner (just behind the yellow NG logo).
Now, one should enter in the context of the contest (no pun intended...): what are the selection criteria? Sure aesthetics, in the case of wildlife also documenting, and also the special meaning that a photo can have in delivering a message about an environmental problem (in this case I suppose the attitude of the subject, in relationship with is endangered status).
In general, I understand that some lacks in the first aspect can be compensated by features in the other two.
But I frankly have enough of this stuff, because I think that things have shifted too much from aesthetics towards other things, and we have also increasing doses of propaganda. That's why, after more than ten years, I've stopped looking at big contests (I used to buy the book from the former BBC Wildlife Photographer of the Year). I also had a subscription to the NG magazine, that I cancelled even earlier.
Today, as a source of inspiration, I'm just following a bunch of photographers I like, some famous, some not, and sometimes looking at a few general websites such as 500px, where I carefully pick shots I like.
Sony a6300, Sony a6000, Sony NEX-6, Sony E 10-18mm F4 OSS, Sony Zeiss Vario-Tessar T* E 16-70mm F4 ZA OSS, Sony FE 70-200mm F4 G OSS, Sigma 150-600mm ƒ/5-6.3 DG OS HSM Contemporary, Samyang 12mm ƒ/2, Sigma 30mm F2.8 DN | A, Meyer Gorlitz Trioplan 100mm ƒ/2.8, Samyang 8mm ƒ/3.5 fish-eye II | Zenit Helios 44-2 58mm ƒ/2
Plus some legacy Nikkor lenses.