Certainly!

True Facts about Decidueye

• Decidueye can rotate its head a full 180 degrees. It cannot, however, turn its hood that far. This is often bothersome to a decidueye but heavily alarming to its trainer.
• Decidueye are indeed considered to be an endangered species, and they can only be found deep within Lush Jungle or in the rugged wilds of Poni Island. The decision to add its preevolution to the starter program was made with the hope that trainers would breed rowlet and train decidueye strong enough to survive, even if released. Encouraging trainers to raise and breed rowlet is also a failsafe to preserve at least the domesticated version of the species in case their wild and feral counterparts go extinct.
• Part of the reason why decidueye are so rare is because they aren’t the most intelligent pokémon. They are known to dive at or attempt to hunt down any moving object they see within their territories … including and especially headlights. (Decidueye are primarily nocturnal, so light pollution of any kind greatly confuse them.)
• Another reason why decidueye is endangered: The foremost predator of its preevolutions is the gumshoos, one of the most common pokémon in Alola. This is ironic because gumshoos and its preevolution yungoos were originally introduced to Alola to combat the overpopulation of rattata and raticate … which are the second foremost predators of rowlet.
• Granted, yes, decidueye do indeed eat rattata as well, although they otherwise primarily subsist on berries, insects, lizards, and bug-type pokémon. Poni Island decidueye will also eat exeggcute, magikarp, and crabrawler.
• Although decidueye don’t lose their ability to fly (contrary to popular belief), they do spend most of their time on the ground. In fact, they like to nest beneath berry trees … which may or may not explain why toucannon (whose preevolutions often gather berries for the entire flock) sometimes find themselves raising rowlet chicks.
• While decidueye (and its preevolutions, for that matter) are immune to common diseases that affect the avian pokémon of Alola—including and especially avian pokémon malaria—the ones that live on Akala Island are not immune to a mysterious condition called Sudden Decidueye Death Syndrome (or SDDS). The exact root of this disease is not well-known, although it may have something to do with the recent increase of salazzle harems in Lush Jungle.
• Decidueye holds a place of honor in native Alolan folklore, as it’s said that they’re the manifestations of a family’s ancestors. Many contemporary Alolans point to the fact that decidueye eventually gains an affinity to the ghost element as the reason behind this folklore, but some experts in Alolan culture have also pointed out the fact that Alolan funerals usually involve heavy use of light and fire. For further explanation for why the latter is relevant, see the third bullet point of this list.
• Decidueye do not molt. This is less because they’re incapable of doing so and more because they pull off old feathers to incorporate into their attacks anyway and have simply adapted to the point where they no longer molt to save on ammunition.
• All decidueye mate for life and will typically engage in mating rituals at the start of the dry season (when prey is most abundant). Decidueye mating rituals begin with the male chasing the female around a territory to get her attention, followed by a display (usually spreading the wings to show the female the feathers most often used in attacks), followed by a show (shooting of said feathers into a chosen target). If the female’s attention is caught by that point, the male will present a gift in the form of prey, and if the female is impressed with the catch, then she will emit a call of approval, which will then lead to the building of a nest and subsequent mating. A decidueye couple will typically lay up to two broods (of one to three eggs) per year.