Originally it was just supposed to be the Rope and Jack, but the El was added for funs.
Roperite - Fearsome Critters from the deserts and foothills of the Sierras. Look like what would happen if a turkey suddenly decided to evolve into a terror-bird. Around the size of a pony with a build like a Harpymimus. Feathered like an ostrich, with tough leathery skin on their legs and undersides, which protects them when running through gravel and sand. Chase down prey, making a rattling sound with their tails to allow other roperites to follow suit. When they catch their prey, they use their fleshy, noose-like upper lip to catch and strangle the prey. Said to be a bit silly, waving their wings around and hopping after jackalope and deer, but one would be unlucky to be the object of their interest. Live in small herds and run about as fast as pronghorns.
-Jackalope: American variants of the wolpertinger. Larger, like a hare, and have smaller, thinner antlers. Generally live in the Great Plains and small parts of the Mojave and Rockies.
-Elwetritsch: Forest fowl descended from human chickens breeding with the avian forest spirits of Alfheim. These forest spirits were like the chickens of elves and goblins. Elwetritsch are about the size of roosters, without their crowns, flightless, pangolin-like scales on their undersides, and have small antlers. Live in the underbrush of Palatinate and Pennsylvania. Unable to be tamed or domesticated. Lay eggs every early summer.
At first read the roperite sounded silly, but then the though of a man-sized bird that strangles its prey while making loud rattling sounds set in and I realized the true horror. Also, this is another poor mythical creature that I've turned into a dinosaur, I'm a monster. A lot of the art I've seen of elwetritsche have the harpy-ish looking statue version, but the actual description of them never really matched that, so pheasant it is. Another funny thought is a Ghibli-esque scene where someone stands in the forest looking for a spirit and that thing waddles out.