Survivors?

Is it possible that a few prehistoric creaturs survived through the extinction fo their preadators/prey?The reports of a large creature with long fur and huge claws in South America maybe the last remaining giant sloths.And the Mokele-Mebebe a creature...

the size of an elephant with a long neck and brown skin liveing in the swamps of the Congo perhaps the decendents of serviving long necked dinosaurs.What do you think of the posibility of survivers?

very low

extreemly rare, if not impossible
mainly because animals like that need to have the food they eat around as well
or be able to adapt to eating different food
theyd also need an enviroment similar to the one they lived in before, the same kind of temperature, ect
theres still a lot of animals out there that are yet to be discovered
after all, were trying to discover whats on other worlds when we hant even discovered everything thats on our own
to have actual prehistoric animals is pretty much impossible
but there can be close decendants of prehistoric animals, if they live in an enviroment that after thousands of years remained almost the same

Extremely unlikely. There's a minimum population required to sustain a species, and it's unlikely that that many of a large animal would survive without detection.

Also, they wouldn't be prehistoric anymore - evolution doesn't stand still. They would have evolved and changed just like any other creature, so they'd simply be an undiscovered species, rather than a 'prehistoric' one.