‘Certain kinds of animals also have a consciousness on the astral plane, which is likewise the plane of idiot consciousness. Helena Petrovna Blavatsky mentions especially certain Indian night insects, nocturnal moths. Spiders also have an astral consciousness; [...] the delicate spider webs are actually spun out of the astral plane. The spiders are merely the instruments of astral activity. The ants too, like the spiders have a consciousness on the astral plane. There the ant heaps have their soul. This is why the behaviour of the ants is so precisely regulated.’
Steiner, illuminating as always. This is, by the way, one of the lectures where Steiner mentions that man, compared to a plant, is upside down. Or the other way around. He also says that the plants will speak to us, if we listen properly (that is, observe them on the correct plane).