Here's today's! Not sure what tomorrow will be yet. Pigeon, maybe?
Common elements: Cockatrices in general are a rare sight, so "common" is relative. Of the few known specimens documented, the most recurring elements were Water, Lava, Poison, Earth, and Fire. Cockatrices with the Water element nearly always possessed Fire or one of its subtypes as well.
Hereditary magic: Nearly all elemental affinity is passed down from the parents to the offspring, but there is a somewhat unique exception. If a Cockatrice is parent to an offspring, that offspring is able to have traits, abilities, and affinities from any individual in that Cockatrice's family tree. It is not uncommon for a pair of two Cockatrice parents to have offspring that differ wildly from them in shape, size, color, and ability.
Elemental weaknesses/resistances: Most Cockatrices are susceptible to Ice, and exposure to too much cold weather will make their minds and bodies sluggish, and can eventually lead to forced hibernation. If the Cockatrice is not prepared for this, they can starve to death. Cockatrices are usually proficient with Fire or any of its subtypes, but are not necessarily resistant to those elements.
Common locations: Cockatrices are, once again, rare, so "common" is relative. They have been spotted mainly in South Owel, mainly in isolated, forgotten areas. Examples include: abandoned mountain towns, old merchant roads no longer in use, and forests which no longer receive consistent foot traffic. Several small populations have formed recently in Mew York, most likely due to the current Mayor being a Cockatrice.
Climate preference: Cockatrices prefer to live in warm areas, and can tolerate any level of aridity or humidity. Rain is acceptable in small amounts. Generally, as long as the environment remains consistently warm, or hot, Cockatrices will tolerate any local climate-specific oddities or weather events.
Level of intelligence: Around 90% of Cockatrices are capable of higher-level thinking, such as the ability to plan ahead, and to define and understand abstract concepts and principles. Around 10% of Cockatrices are not capable of this higher-level thinking, but are nevertheless still highly intelligent and clever.
Language: Nearly all Cockatrices speak Lisk, and are commonly born with the ability to do so. Most still also can speak Common, but it must be learned.