Quick run down for those who aren't sure where to go and what to do.
1) Go and speak to that chap Wilson at Moonglow Zoo. Get a brush from him.
2) Find some giant turkeys. You're going to want some friends along for this. Don't take a tamer - he'll munch your pet and one hit kill you when he teleports you in. Ditto mages and summons. We've found that archers and bards work best.
3) When the turkey is (eventually!) dead, you'll get either a map or a map fragment. Three fragments make one map.
4) Once you've opened up your map, identify the area and go there. Double click the brush you got from Wilson, then click on the map. You'll get a message that tells you whether you're in the right area or not. Rinse and repeat til you find the nest. Double click the giant eggs to destroy them, and open up the bag for your reward.
Hope that helps folks!