Dart and Dart's Nest (Darting Hatchling)

Dart is a level 37 rare orange raptor that can be found in northern Dustwallow Marsh just east of Blackhoof Village. (I have indicated where he can be found on the map below in the red circle.) Before patch 3.3 he dropped the vanity pet Darting Hatchling pictured on the right in the picture above. The hatchling no longer drops off of him but can now be looted directly from the nest Dart's Nest and is a 100% chance drop. As of 4.2 he drops a green and a decent amount of experience for toons around his level. 

Dart does not need to be up for the nest to be spawned in and vice versa, they have independent spawn timers which seem to be a couple of hours each. I have found him alone before with no nest, I've found just the nest and I've also found both up at the same time. The nest will also only spawn near the location of the rare raptor.

There are three other rare raptors with associated hatchlings and nests and those are:

Takk the Leaper - Leaping Hatchling (Northern Barrens)

Razormaw Matriarch - Razormaw Hatchling (Wetlands)

Ravasaur Matriarch - Ravasaur Hatchling (Un'goro Crater)

The other hatchling pets are all still randoms drops from raptor mobs.

There are four spawn locations of the nest (in green on the map above). If you use the tomtom addon for waypoints this macro will be helpful in finding them:

/way 48.0 14.2
/way 49.2 17.5
/way 47.9 19.0
/way 46.6 17.1 



Here is an example below of what the nest looks like when found: