to be on the edge of; to border; to be on the verge of

to be in imminent danger; to be on the verge of extinction

nearing death; on the point of demise or approaching extinction

to be near to or approaching a state, usually a negative or undesirable situation like collapse or extinction

to be close to; to approach or be on the verge of

species that are at risk of extinction

Convention on International Trade in Endangered Species of Wild Fauna and Flora

to be situated on the bank of a river; bordering a river or riparian

to be close to the sea or bordering the coast

on the brink of extinction; near extinction