Fetching details from the dictionary...

to crawl; to creep; to go on all fours
to slither; to wriggle
to trail (of vines, flowers, etc.); to spread; to creep
カタツムリが壁を延って上っていく。
A snail is crawling up the wall.
蛇が草むらの中を静かに延っていた。
A snake was quietly slithering through the grass.
朝顔の蔓が柵に沿って延っている。
Morning glory vines are creeping along the fence.