This is not a question, its just something i want to get out. If anyone was any questions like 'what if there were no more birds' or 'what if sharks were to vanish', first of all, that is physically impossible for an living being to just vanish like that..it could go extinct though if that's what you mean.

second of all, you have to think about food chains and food webs.
flower, caterpiller, frog, snake, owl.
if the frog were to go extinct, the snake will starve, which means the owl will also starve. yes, they might have other animals as there diet but the frog is like 1/4 of there diet. that's not it though, the caterpillers' population will increase, as an result in them eating all the grass, which means no more grass in that area, which can have bad outcomes.

you also have to think about what the animal(s) eat, and what eats those animals.
again, flower, caterpiller, frog, snake, owl.

i hope this helped you all with these questions. if you need me to break it down more, then comment down bellow..!