brown tree snakes are nocturnal. most of Guam's native forest birds are not. explain how this has affected both the snakes and the birds. The snakes easily find and kill the sleeping birds, and the snakes success has allowed them to reproduce quickly.
A person may have both internal and external hemorrhoids. Symptoms of hemorrhoids include occasional throbbing pain, itching, burning sensation, bright red blood on toilet paper or stool, or a lump of soft tissue protruding outside of the anus.
Signs and symptoms of subarachnoid hemorrhage. The first symptom of a subarachnoid hemorrhage is often a sudden and severe thunderclap headache. Patients describe the pain as similar to receiving a blow on the head, and the worst headache of their life. This headache typically pulsates towards the back of the head. Other symptoms include: