North Atlantic right whales (Eubalaena glacialis) are big, but they're not the biggest whales. That distinction goes to the blue whale (Balaenoptera musculus), the largest animal on Earth. The orca's size of up to 31 feet (9.4 meters) makes it the largest dolphin. The sperm whale, on the other hand, may not be the biggest whale, but it has the biggest brain to have ever existed on Earth. A comparison chart of whale sizes helps put it all in perspective!
Chikungunya fever is caused by a virus that is spread to people through the bite of infected mosquitoes. Like Dengue, it is transmitted by Aedes mosquitoes, especially Aedes aegypti (the yellow fever mosquito) and Aedes albopictus (the Asian tiger mosquito).
Adults of Ae. aegypti are relatively small and show a black and white pattern due to the presence of white/silver scale patches on a black background on the legs and other parts of the body. Some indigenous mosquitoes also show such contrasts (more brownish and yellowish) but in those cases it is less obvious.edes aegypti has long been recognised as a vector of dengue, causing major dengue fever epidemics in the Americas and South East Asia, where the incidence of the more severe form (dengue haemorrhagic fever) has been increasing [8]. Global incidence of dengue has also increased in the past 25 years [5].