http://waarneming.nl/waarneming/view/41812473 (http://waarneming.nl/waarneming/view/41812473)
Hybride bonte tamme x Grote Canadese (of toch Brand?) resp. Grauwe/wildkleur tamme x Grote Canadese Gans.
I think both are Canada x greylag,
the left x domestic greylag, the right could also be x domestic greylag, but as it is wildcolored i think you canĀ“t say for sure