The snakes have evolved resistance to the blowfish poison, tetrodotoxin (TTX), by preying on rough-skinned newts, which also secrete the toxin. Some newts are so poisonous that they harbor enough TTX to kill a roomful of adult humans. ... The answer lies in the evolutionary back-and-forth between newts and garter snakes
Answer:
mitchondria is powerhouse
Other birds that are native to the vicinity might run out of food or habitat because of these Mute Swans. If these swans really do eat 8 pounds of vegetation each day; imagine what would be left for the other birds.