In the field of dendrology, it has been recently discovered that dodder vines (also known by some pretty colorful names including Witches' Shoelaces, Devil Guts, Hairweed, Love Vine, and Strangleweed), a parasitic plant that requires a host to survive, searches out its host by smelling for it. The dodder will move around in circles, detecting the chemical fingerprints of potential hosts, until it finds the right one and latches on.
The following video is a time lapse of a dodder's movements as it chooses between a wheat and a tomato plant; skip to 0:25 if you want to get straight to the action.
Ever heard of dodder vines before? (I hadn't until last night when I watched Nature.) Do you grow any vines or trees?
-----The Golden Eagle