Complex sentence: In some regions where "Gillia altilis" is native, populations are declining or not very abundant: for example, in Vermont, this species is considered to be an invertebrate species in "greatest conservation need".
Split into simpler sentences: In some regions where "Gillia altilis" is native, populations are declining or not very abundant. For example, in Vermont, this species is considered to be an invertebrate species in "greatest conservation need".