Colloquial? I think. Hope this helps
Answer:
As the disappearance of the otters, the diet of the glaucous-winged gulls change from eating fishto consuming invertebres mainly. When Otters disappear, kelp is also disappear and that leads to the disappearance of kelp fish. Due to survival of the fittest, glaucous-winged gulls have to switch their diet to mainly invertebres.
Explanation:
Hope this helps
Since they control lots of island groups which makes thing hard to border up and defend on all sides... Unlike in Germany which they had 2 fronts and it was easier to have bunkers to defend certain location...
