English: Illustration of the theropod dinosaur Guanlong wucaii, a tyrannosauroid from China, dated to the Oxfordian-stage (late jurassic). We don't know if it had feathers, but based on it's relative Dilong paradoxus, it may had the body covered with hairlike structures. It had a crest on the head, maybe used for displaying during rut.

External links.

• ‘’http://eu.art.com/products/p15447482-sa-i3746357/ira-block-skull-of-a-guanlong-wucaii-the-earliest-known-tyrannosaur.htm?sorig=cat&sorigid=0&dimvals=0&searchstring=guanlong&ui=c139e129982a434ab3408458500a6b12 (Guanlong's skull).
• ‘’http://www.futura-sciences.com/galerie_photos/data/575/guanlong_fossile.gif’’ (Guanlong's skull profile, pointing to the rights).
• ‘’http://imagecache2.allposters.com/images/NGSPOD/1167294.jpg’’ (Guanlong's skull profile, pointing to the left).
• ‘’http://www.futura-sciences.com/uploads/tx_oxcsfutura/img/Guanlong_wucaii3.jpg’’ (Diagram of Guanlong's skull).
• ‘’http://pds10.egloos.com/pds/200901/28/95/a0105695_497ff0ecc542e.jpg’’ (a more nice illustration of Guanlong).