u/-Artafar-

Herd grazer native to Tanedeva. A country in the western region of a continent where the day-night cycle takes a year.

They grow to about 3 meters in length (10 feet) and lay massive eggs. They make a high rolling r sound to communicate.

In the day, it gets to about 50-60 degrees Celsius (131 farenheit) in Tanedeva though there is rainfall about every earth week. These creatures keep themselves cool with their "wings".

They transfer the heat from their backs (where big veins are) to the feathers with magic, cooling their blood. The feathers have nerves running through them (My magic system is tied to concience/the brain/information so it helps to have nerves where the magic is happening (nerves transport information)). The feathers are sensitive for obvious reasons.

There is an almost constant wind in Tanedeva so the Mahl position themselves with their wings flat against the wind, cooling them and in turn, cooling their bodies. Their wingfeathers have a concave shape to catch the wind.

Only the concave side of the feathers give off heat to maximize efficiency. This, coincidentally, makes them also very useful for keeping warm. The Mahl can let the wings down so the concave sides face their bodies and keep warm.

When it becomes night, the Mahl migrate to a tiny peninsula poking out of the spell that makes the days and nights long. The strong winds still carry the cold from Tanedeva but it is bearable for there. They mostly sleep on the fields at night, surviving on the fat they built up during the day, the limited grass on the peninsula, and the water from the beaches.

They also mate and lay eggs at the start of the night, incubating them while hibernating. The young hatch in time for the herd to start migrating again.

Utility of the feathers

When an object has had a spell used on it (or through it in this situation) it remembers the spell, meaning humans can use them.

The feathers are harvested with the nerve endings. The nerve endings are then woven into clothing with the concave side of the feathers facing outward, keeping the fabric cool during field work or anytime a person is wearing it outside. It is not very effective inside because there is no wind inside.

At night, these can be flipped inside out and worn over several layers of clothing. The concave side facing inward doesn't let any warmth escape.

One could also engineer a water cooling container or make a fan that can be used to warm oneself.

Clothing of these feathers has to be exposed to wind often or it will "forget" its magic and become useless.

I want a short, preferably a one-word name for this bird cow thing. Can be a name with just a fitting sound. The name does not have to describe the creature, though i am not opposed to that.

They can grow up to 3 meters in length and live long lives. They travel in herds and eat grass with their beaks.

They produce a milk-like substance in a gland that they feed to their young mouth-to-mouth.

These creatures provide feathers for clothing, insulation, bedding, fashion. The feathers make for good coats for the cold. They could maybe have spots with different colored feathers too. Their skin can also be made into leather for clothes and bags and such.

They lay massive eggs but this only happens once a day in the evening (A day + a night is one year long where they live) so the eggs are not a common food. The domesticated ones survive the night because humans give them shelter and feed them crops from the day. The wild ones migrate to a forest with foliage so thick that the forest holds up the snow, becoming a massive igloo that keeps heat inside.

And obviously they provide meat. And maybe transportation.