Dinosaur parasites

"A hundred million years ago, there were mosquitoes, just like today. And, just like today, they fed on the blood of animals. Even dinosaurs!"

- Mr. DNA

"What if a mosquito sucked the blood of a dinosaur, one hundred million years ago?"

- John Hammond

 is the practice of certain animals (mostly "") of feeding on blood. Small parasites have existed for a long time because it is an efficient method to obtain food. Blood is a fluid tissue rich in nutritious proteins and lipids that can be taken without enormous effort and without killing the host. Parasites that feed on blood include worms (e.g. leeches) and arthropods (e.g. mosquitoos).

In the sole source of dinosaur DNA are mosquitoos that had sucked the blood of a dinosaur. In Jurassic Park: Builder leech-like worms are a source of DNA from aquatic creatures.

It is a matter of debate whether mosquitoos existed through the Mesozoic Era. Furthermore, dinosaurs had a though skin covered with scales and feathers. It would not have been easy for mosquitoos to feeding on dinosaurs.

Mesozoic parasites
In the Showroom Scene Mr. DNA says:

A hundred million years ago, there were mosquitoes, just like today.