It might have Giardia related to the featherless neck. If you want to know more about it go to: http://www.birdchannel.com/bird-diet-and-health/bird-diseases/feather-loss-may-be-giardia.aspx.
You should also take your Lovebird to an avian veterinarian for a workup and diagnosis.
He has 3 tail feathers.
A pelican
Turkeys have many types of feathers such as beard, crest, ear tuft, flight covert, fluff, lesser sickles, main tail feathers, muff, neck hackles, primary flights, saddle, scapular, secondaries, sickles, tail coverts, vulture hocks, wing bar, and wing bow coverts.
Yes. Most birds like cockatoos, Amazons and grey parrots can bite. Signs of them being ready to bite are the tail feathers being fanned out, and their neck feathers raised.
how to oil paint a rooster's tail feathers
Tail feathers are for steering, like the rudder on a boat.
flight feathers
They have a rich blue neck and a huge plume of 150 blue-green tail feathers with a distinctive eye-shaped pattern.
Contour feathers are on the wings and tail.
Many websites state that the tail of the Superb lyrebird has 16 feathers.
the tail has flight feathers and the flight feathers help a bird to fly.
Yes, check out this picture of a Swan neck skeleton, you can see them: http://upload.wikimedia.org/wikipedia/commons/1/1aSwan_neck_skeleton.jpg