The Hungarian Horntail dragon is native to Hungary. It is a gigantic black creature with vertical pupils like a cat, and looks more lizard-like than other dragons.
From the Story
Discovered in Book 4, Chapter 19, The Hungarian Horntail
"The Hungarian Horntail is one of the four dragons to be involved in the first task of the Triwizard Tournament. Before the task begins the dragon is being kept in an enclosure near the Forbidden Forest. When Harry arrives at the enclosure with Hagrid and Madame Maxime, the dragon is being restrained by seven or eight men, held by chains connected to heavy leather straps around its neck and legs. Its eyes bulge with either fear or rage, and it makes a horrible noise - a yowling, screeching scream. That particular Hungarian Horntail has been known to shoot fire at a range of forty feet, with the other dragons able to reach at least twenty feet. The back end of the Hungarian Horntail is as dangerous as its front; long, bronze-coloured spikes protrude from the dragon's tail every few inches. The Hungarian Horntail is hit with several Stunning Spells simultaneously and falls to the ground, unconscious."
Discovered in Book 4, Chapter 20, The First Task
"Harry faces the Hungarian Horntail dragon during the first task of the Triwizard Tournament. The dragon is fiercely protective of her eggs and is not easily persuaded to leave the ground. She writhes and twists as she watches Harry, furling and unfurling her wings, but is too afraid to move far from her eggs. She regards Harry as though he is a fly she is longing to swat; her tail thrashes at him but he is too high to reach. The Horntail finally rears from the ground, spreading her great black leathery wings at last, allowing Harry to dive towards the eggs before she can react. The Hungarian Horntail is restrained by the dragon-keepers after Harry collects the golden egg."