Mosquitos and fleas
COPD is responsible for more than 96,000 deaths annually
The hippo and the black mamba.
Volcanos burn
Heart attacks (myocardial infarctions) are the number one cause of cardiovascular deaths. Strokes (cerebrovascular accidents) are second.
Deaths from cardiovascular diseases accounted for more deaths than any other cause (with cancers being the runner-up).
Mosquitoes are responsible for the most human deaths in the world, as they can transmit diseases such as malaria, dengue fever, and Zika virus through their bites. This makes them one of the deadliest animals on the planet in terms of their impact on human health and mortality.
Because the bombers had bombed their before and the London people did not invent blackouts then.
Dangerous, yes, The human animal however is responsible for far more deaths.
the most casualties in a war was the American Civil War with 495,332 deaths and behind it is WW2 with 405,399 deaths.
Heart Disease
Hippopotamus