We arrogant humans consider ourselves to be the crowns of creation, but perhaps trees deserve that honour. I’ve been collecting evidence. For example, I admire the work of Monica Gagliano who has demonstrated learning (Pavlovian conditioning) in trees. Lesser plants also express emotions.
We’ve known for years that trees communicate quite complex information with each other using an underground network of fungal filaments
Now, there is fascinating new information. Neighbouring trees warn each other of aphid attacks, so defences can be mobilised.
So what, you ask? Some automatic mechanism that improves survival rates, so is selected for?
My counter question is, why should the already attacked tree bother?