I don't know what it is Ribh. I have asked. It's been there a long time and if left alone grows a bit like a willow tree throwing trailers out from above which droop to the ground. It is very popular with the chickens which is just one of the reasons I get pissed when one person in particular from the main house decides it needs pruning. If it was just pruned I would feel better but it gets savaged. Still, it survives and grows back every year. There are currently three wild birds nests in the upper part. There was a young woodpecker (Picot Verde) in it yesterday waiting for the chickens to get fed.
Close to the house there are four main prime chicken shelter spots and that is one of them. One other you've seen in my pictures of chickens on the steps. Both sides of the steps have bushes and Tribe 2 in particular favour this area.
Then there is the bamboo clump. This is great for the chickens and in the event of a hawk attack most will head into the bamboo. So far I've managed to prevent anyone cutting it down.