National Geographic has a story straight out of Jurassic Park.  The story is about the recent discovery of blood-filled ticks trapped in Burmese amber.  The amber dates to the Cretaceous period, about 99 million years old.  This places the fossil firmly into the age of dinosaurs and implies that these ticks probably feed on feathered dinosaurs.  The paper describing this discovery appeared in the journal Nature Communications.

One of these parasites is tangled up in a possible dinosaur feather found encased in a lump of amber. Another was found in a separate piece of amber from the same region and had swollen to eight times its original size, suggesting that it had been engorged with blood when it died.
The preserved plumage likely belonged either to a feathered dinosaur or a primitive type of bird known as an enantiornithine. These early and abundant birds still had small teeth in their beaks and went extinct along with the nonavian dinosaurs 66 million years ago.

“We are not able to pinpoint the exact host,” says study coauthor Ricardo Pérez-de la Fuente, a paleo-entomologist at the Oxford University Museum of Natural History in the U.K. “But we can rule out modern birds, as they only appeared about 25 million years later than the age of the Burmese amber.”