The Stealth Scrapadactyls are the main antagonists of the episodes Pteracopters and Picktools (alongside the Arctic Scraptors). They are a subspecies of Scrapadactyls which are skilled at avoiding being hit.
A Stealth Scrapadactyl looks like a regular Scrapadactyl, but with a darker body. They are armed with laser sensors that detect a Dinotrux's movement.
Stealth Scrapadactyls act just like regular Scrapadactyls, flying during both day and night and stealing scrap, but also keeping watch with their motion-detecting laser vison. They end up getting hit less often than their regular counterparts, which makes them even more dangerous.