Virtuous flaming bird of prey

Mythical Avian Creature

Coloration is generally more uniform among phoenixes, with the brightest
plumage usually located on the crest, and feathers becoming darker in color across the bird’s shoulders and on the f light feathers. While red and yellow are the most common hues among phoenixes’ blazing feathers, white, green, and blue have been documented as well. Such uncommon colors are primarily found on the most powerful phoenixes, the hues directly correlated with the heat of the phoenix’s f lames. A phoenix’s underbelly is lighter and ranges from white to yellow, though older individuals have been known to have ash-gray or jetblack
stomachs

Takes the form of the largest bird of prey in the area, most often a raptor, such as a hawk or eagle, but in rare instances, they have taken the form of owls or even peacocks.

Phoenixes grow to enormous sizes, and despite their massive wings, they are graceful, agile fliers. An adult phoenix stands 20 feet tall, has a 40-foot wingspan, and weighs about 5,000 pounds.

It's a giant flaming bird.

Phoenixes are made of mostly feathers and fire.

Phoenixes are not aggressive toward good-willed creatures, but will actively seek out and destroy those who intend to do harm

Flaming beak, talons, all sorts of fire-based magic effects and spells.

Is reborn every time it dies from old age or combat, can also cast powerful fire-based spells.

can reach a top speed of 30ft/s

It's a fucking giant bird that is on fire.

Vulnerable to the cold. And water.

The song of the female phoenix is higher and often deemed more melodic than that of males. Indeed, while
a phoenix’s song does not usually possess any mystical influence in and of itself, the cry is often as fascinating
to listeners as any of its other powers. Likened to a songbird’s melody combined with the harshness of a
raptor’s shriek, a phoenix’s cry is supposedly good luck for virtuous individuals who hear it and a bad omen for would-be evildoers.

their lairs often contain many rare scrolls and books, carefully protected against the obvious risk of fire. A phoenix is often more than happy to give such rare documents to gracious and good-intentioned mortals, though it will occasionally make a copy of the
text to keep if the information it contains is particularly important.

Phoenixes’ innately solitary nature makes them difficult allies to acquire, as most such creatures dwell in secluded areas in desolate hilly regions or valleys.

Most phoenixes are birds of prey, and although they can subsist on large quantities of fruit or plants if necessary, many prefer the taste of meat and the thrill of the hunt. They typically feed on local wildlife such as grazing gazelles or antelopes, as well as various species of deer and aurochs. Phoenixes prefer their meat raw, but the hospitable creatures are happy to quickly roast a meal for guests with more discerning palates.

Phoenixes form strong bonds with their mates, though because of their solitary natures they do not spend much time in each other’s company.

Giant Hawk, Eagle, Peacock, or Owl, depending on location

The phoenix is seen as a symbol of virtue, healing, strength, and eternal life.

A pair of phoenixes comes together to mate only at great intervals, and the parents of a young phoenix then care for their offspring for the first few years of its life. After this span of time, the firebirds leave each other, casting themselves far and wide in order to spread their benevolent influence and words of wisdom. Each century, however, the original couple will come back together once more to rear another fledgling, rekindle their affections, and share their knowledge.

Most of this has been straight copy/pasted from Mythical Monsters Revisited by Benner, Jesse, Jonathan H. Keith, Michael Kenway, Jason Nelson, Anthony Pryor, and Greg A. Vaughan. (Paizo, 2012)