Skrill Theory
Skrills are not native to the archipelago and probably come from Europe. This is due to their coloration, diet, behavior, and abilities. The skrill is a medium sized strike class dragon that is said to “rival the nightfury”. It gains power from storms and can redirect lighting.
Skrills are confirmed to prey on other dragons, primarily the singetail. Singetails are not common to berk or the archipelago and are found south of berk, this infers that they’re not generally from the area. the skrill is the only dragon that hunts the singetail and are perfectly specialized in taking them down. It would make sense that the skrill would also be from a different area to hunt singetails.
Storms harnessing is the defining power of the skrill, they will locate storms and channel electricity and store the energy. Lighting storms are most common in warm environments. Making the archipelago an unsuitable area for the skrills to live. Hence why this skrills most suitable area to live is most likely southern Europe
reasons for picking southern Europe, is the fact that the skrill has a skull suitable for eating and catching fish. A narrow but roundish a jaw. Their purple coloration also raises an eyebrow due to it being a constant in most skrills we see in the franchise, canonically most if not all have some purple coloration. In birds, predominantly purple-colored birds are found in warmer climates and is usually caused by selective mating or diet. Singetails, fish, and electric eels probably wouldn’t cause this, (the deathsong is also slightly purple and can eat electric eel so it might be possible but highly unprobeable). I think it's most likely that the purple coloration is for mating, the Peacock like patterns on the inside of their wings could also be attributed.
One of the problems to this theory is the fact that we see two skrills in the archipelago and the Vikings have general information on them. Well, my explanation for that is that skrills hibernate, especially when lightning storms become scarcer. It would explain why they have the large claws on their wings; my theory is that they use those to burrow into a cold area and hibernate till the storms come back. This is my best explanation because it is stated that the spines on their back are used to channel electricity, not the claws. The hibernation theory would explain why the berserkers or are there Vikings wouldnt witness a skrill, because of hibernation. I believe that the skrill in the ice accidentally got stuck because it went too far up north yrt survived due to its high body temperature. Their stats are kind of off from what is exhibited by skrills in the show, I think this is because Vikings only witnessed the skrills that were coming out of hibernation thus underpowered and caught at their worst.
This is a bit more into deeper theory but skrills and nighfuries could be related. They have similar stats, powers, and body structure, there could be distant relatives and could come from Europe. Grimmel is Seated to be from Europe and be hunted nightfuries to extinction (which I think is total bs). If skrills and nighfuries are related that could mean They both could be from Europe and far away from Berk.
Thanks if you're reading this all the way through, my services are the wiki, fandom, And the skrills and nighfury related theory is from Hello Future Me in this great vid https://www.youtube.com/watch?v=j6z1AFbU8Wc. These statements aren't the absolute truth, and this is a theory that could have a lot of inaccuracies, if you spot any please tell me. Thank you.
Thank you @uuhhhhwhat and everyone who got me to 5 reblogs!