> A study of DNA extracted from the leg bones of extinct moa birds in New Zealand found that the half-life of DNA is 521 years. [1]

So at most ~5.6% of DNA could have survived. It would be interesting if researchers would be able to detect a fraction of that amount, but it seems implausible.

[1] https://www.sciencefocus.com/the-human-body/how-long-does-dn... | https://archive.is/S39fv