Do Biters Attack Power Lines?

The above mentioned structures will not appear on the map anymore, this can't be changed. If they can't get past something they will attack it, which does not apply to rails as they are non-blocking. If they fire spit at you and you're standing on the rail, it will damage the rail.

Will biters attack train tracks?

The biters will proceed to attack the train and rails. Biters ignore rails unless angered by trains. Hovering over a train produces an information panel which includes how many biters the train has killed.

Do bugs attack railroads Factorio?

So as a rule of thumb, if a railroad, power line or solar panel is alone in the wild, they will not attack it ; if it is close to a turret, a miner, a factory or anything that produce pollution, it may be attacked during a fight.