Hi
the verbs in the three mentioned examples must be used in present simple.
You can determine the tense (present simple or present continuous ) depending on the adverbs in the sentence and on the meaning.
for example we can't say nests are being damaged or are being protected ( we are talking about general situations).
in addition, the first two examples are( if )sentenes and we don't use present continuous with conditionals.
Best wishes
Ola