They are NOT harmful to grasslands, they are supposed to be a part of grasslands for the ecosystem as a whole to function properly. Mother Nature didn't create a specific landscape to have animals be harmful to it.
There are harmful to all organisms, but some bacteria are helpful in many ways.
Some of them are, however, there are many microscopic organisms that are not harmful, some of which you could not survive without.
Milkweed bugs are not harmful to plants, as they primarily feed on the seeds of milkweed plants. They are not known to be harmful to other organisms either.
Ticks latch on to other organisms and feed off them.
Giraffes, turtles, penguins, monkeys, elephants, ant eaters, and pelicans
baki,toko,linta,baboy,kabayo,baka,bird,
kinds of resident organisms
Kills bacteria and harmful organisms.
Pathogen means "disease-causing" (pathos-: suffering, disease; -gen: begetting) Therefore: "harmful to living organisms" For the other answers: beneficial organisms are not pathogens; harmful only to plants are specifically plant pathogens; "nearly extinct" has no relevance in this question.
There are snakes, in some lions,and prairie dogs, that is only a few though.
The substance that absorbs radiation and helps protect living organisms from its harmful effects is called a shielding material.
Genetically modified organisms can outcompete other organisms, decreasing species diversity.