High blood pressure symptoms, signs and risks. High blood pressure, or hypertension, doesnât usually cause any obvious symptoms. The British Heart Foundation estimates that up to 5 million people in the UK have undiagnosed high blood pressure. Left untreated, hypertension can lead to serious diseases, including stroke, heart disease, kidney failure and eye problems.
Quick Answer. The northern ringneck snake is a bluish-black snake that grows to approximately 2 feet in length and lives throughout a sizable portion of North America. The morphology of the ringneck snake varies slightly in terms of coloration, with olive and brown varieties living in certain areas. Continue Reading.
The grass snake grows larger than the adder and a specimen I found near Speech House in the Forest of Dean measured 120cm, if this snake is still alive today it could be over 4 foot long, but even this is small compared to some that can reach 200cm or more!