An extremely rare, 46-million year old fossil of a mosquito with traces of dried blood in its engorged abdomen has now been discovered by a team of scientists in Montana

Scientists have yet to determine what creature the blood came from since DNA cannot be extracted from a fossil that old.
Greenwalt speculated that the blood might have been from a bird, as the prehistoric mosquito looks similar to a modern one from the genus Culicidae, which likes to feed on birds as well.
The study was published in the Proceedings of the National Academy of Sciences.
Source-ANI