Teostra Ecology

Disclaimer: This is merely a plausible explanation for the monster(s) in this article, and should not be considered canon.

In-Game Information
A brutal male elder dragon with breath of flame and expert control over fire. Its vile temperment means anyone who approaches is subject to fire and brimstone. Known to attack towns, the Guild keeps tabs on its movements.

Taxonomy
An elder dragon. It is most closely related to Lunastra. However, there are some very small similarities between Teostra and Kushala Daora, suggesting that they may distantly related, but taking a very different direction in evolution.

Habitat Range
Teostra prefers areas with intense heat, namely the Volcanic Belt and the Desert. On occasions, it can be seen in the Swamp and has been known to attack the Town. It's also probable that Teostra goes to the Tower, as its mate Lunastra can be found there.

Ecological Niche
As an elder dragon, Teostra commands a high role in the food chain of its habitats. A few monsters will attack it, such as Tigrex and Rajang.

Biological Adaptations
Possessing mastery over flame, there are few creatures that can hope to last against Teostra for long. To defend itself, the Teostra also utilizes a heat shield, or flame aura, which damages enemies that get too close. To keep its flame powers going, it consumes coal in the Volcanic Belt.

Behavior
Teostra is a very aggressive monster. It will show dominance to anything that it encounters. Compared to Lunastra, who gives warnings to get out of its territory, Teostra will ruthlessly attack intruders until they are dead. As the strongest aggressive elder dragon (other than Fatalis), Teostra are highly feared. It is not advised to go out into the Desert, Volcano, Swamp, or Tower during its mating season, as the prospect of fighting both Lunastra and Teostra together is often considered suicidal.