Hi, I have a question regarding one of my birch trees in my back yard. I have 5 of them, which were planted probably 5-10 years ago (not sure), and 4 of them have started leafing out "properly". However, the 5th one is doing something very odd. There are new leaves popping out about halfway up the tree, but the whole top half is totally bare. It's rather tall, so I can't tell if the limbs and twigs are still alive, but it appears to be fine. I know nothing about these trees, and it's my first spring with them (we bought the house last summer), so I don't know if this is normal for this type of tree, or for this specific tree. Any ideas? Thanks!