1) 190kg Quetzalcoatlus vs 250kg lion (land battle)
2) 190kg Quetzalcoatlus vs 300kg american black bear (land battle)
3) 2x 190kg Quetzalcoatlus (wort together) vs 900kg female black rhino (land battle)
3a) 2x 190kg Quetzalcoatlus (wort together) vs 900kg banteng (land battle)
4) 190kg Quetzalcoatlus vs 200kg wild boar (land battle)
5) 2x 190kg Quetzalcoatlus (wort together) vs 1200kg ceratosaurus (land battle)
6) 190kg Quetzalcoatlus vs 200kg pigmy hippo (land battle)
6a)190kg Quetzalcoatlus vs 200kg pigmy hippo (1,5m deep water)
7) 190kg Quetzalcoatlus vs 2x 65kg rotwailer (land battle) (work together)
8) 190kg Quetzalcoatlus vs 400kg nile crocodile (land battle)
9) 190kg Quetzalcoatlus vs 100kg american aligator (1,5m deep water)
9a) 190kg Quetzalcoatlus vs 120kg anaconda (2m deep water)
10) 5x 190kg Quetzalcoatlus (wort together) vs 3t female asiatic elephant (land battle)
11) 10x 190kg Quetzalcoatlus (wort together) vs 7t acrocanthosaurus (land battle)
Thank you for the previous answers. You are really the best.
Quetzalcoatlus was the largest flying creature ever, and it was a reptile. Its wingspan was greater than the length of 2 automobiles, and its head (including its long, sharp beak) was over 2.5m in length. There's a lot of unknowns in regards to Quetzalcoatlus (exact weight, what it ate, how it ate, how well could it travel through the air, etc.). It probably wasn't very mobile or agile once on the ground, but its unique build and potentially effective use of its beak as a weapon make it a very interesting animal to use in an animal vs animal matchup. The sharp beak of Quetzalcoatlus may have driven like a spear to incapacitate its prey (much like storks and other wading birds do today), to seize prey (like a heron does), or to defend itself against a predatory threat. In most matchups between animals, the weight of each can be a strong factor in which one will prevail on most occasions, but how each animal can and will function in a battle must be considered. Quetzalcoatlus, despite its limited lateral movement on land, will have a tremendous reach advantage over many opponents because it will likely be able to impale the adversary with its long beak before the adversary can get close enough to make physical contact (and employ what may be a weight or strength advantage). The perimeter around a stationary Quetzalcoatlus that measures how far way its "beak stabbing range" will be is a dangerous line to cross, and other animals will be relatively safe outside of that line unless the pterosaur elects to waddle toward it. The key to defeating this huge pterosaur will be avoiding its stabbing beak and getting close enough to it to utilize an offense from a safe range (being quick enough to move out of the way or close enough to make it difficult for the reptile to employ its weapon). It's also important to point out that 2 animals that don't encounter one another may not know quite what to expect or what dangers to look for in a hypothetical encounter, but most will approach with a decent degree of caution when seeing something new. A lot of these answers will be based on assumptions to some degree considering the unknowns about Quetzalcoatlus' behavior, but I'll try to be as accurate as I can be.
1) 190kg Quetzalcoatlus vs 250kg lion (land battle): A Quetzalcoatlus weighing 190kg will stand at least 5m tall, which will be slightly more than 4 times the shoulder height of the lion. Male lions are the protectors of their prides. They battle rival lions quite often for the rights to territory and females, and are among the best fighters in the big cat world. Lions are very powerful cats with great agility and athleticism, and they are armed with sharp teeth and sharp claws. Although lionesses do most of the hunting, male lions will join in on occasion to help overpower large prey items. Against the Quetzalcoatlus, the lion will need to use its quickness and agility to avoid the reptile's thrusting beak, and close in quickly to leap upon the taller animal. A 250kg lion would easily be able to overpower a 190kg wildebeest, but the pterosaur will likely be well-based (its wings can presumably fold to enable all 4 "limbs" to be in contact with the ground) and difficult to topple without the lion leaping or climbing to a high area of its body. Once the lion makes contact with Quetzalcoatlus, the big cat's weight will seriously impede the pterosaur from effectively fighting back. Much like lions will sometimes attempt to leap or "climb" upon a giraffe when attacking one, it's likely the lion will attempt to do the same to the reptile, and will probably have much better success (the Quetzalcoatlus will be much lighter than a giraffe and will be easier to pull to the ground). Edge to lion.
2) 190kg Quetzalcoatlus vs 300kg american black bear (land battle): Quetzalcoatlus will stand almost 5 times as tall as the American black bear's shoulder height. Black bears aren't as formidable pound-for-pound as brown bears (less powerful builds; typically not as combative), but are still very dangerous adversaries for anything they view as a threat. The American black bear does possess the typical ursid attributes (strength, great stamina, strong jaws, sharp claws, effective forelimb usage, etc.), but it won't have the same agility and lateral quickness of the lion in the previous matchup. Bears don't leap upon prey targets like lions do, and they don't have the expert finishing ability of the big cats. Even though the black bear will have a significant strength and weight advantage over the Quetzalcoatlus, it won't be able to avoid getting stabbed if it attempts to close the distance with the much taller creature. Even if the bear gets close enough to the Quetzalcoatlus to launch a close-quarters attack, its jaws and claws won't initially do a great deal of damage without reaching the more vulnerable areas higher up. The bear will have the strength to force the Quetzalcoatlus to the ground, but might not know to employ that strategy. Realistically the bear will likely avoid this battle altogether, but any serious battle will actually favor the pterosaur due to its great reach with its long beak. Even the larger bear species (brown, polar) will have difficulty winning this matchup for the same reasons. Quetzalcoatlus wins.
3) 2x 190kg Quetzalcoatlus (wort together) vs 900kg female black rhino (land battle): The Quetzalcoatlus will stand almost 3 1/2 times taller than the shoulder height of the rhino. Black rhinos, even the females, can be very hostile toward any perceived threat. They have tank-like builds, tough hides, and 2 sharp horns protruding from their snouts. The black rhino can make powerful charges and thrusts with its body and cause very serious injuries with its longer horn (in front). The 2 Quetzalcoatluses will be able to thrust at the black rhino with their long, sharp beaks, but this will induce the mammal's violent retaliation. The charge of the very strong rhino will easily topple either Quetzalcoatlus upon contact (they won't be able to get out of the way), and the horn thrusts can potentially break bones. The tough hide of the rhino will hold up reasonably well to the initial stab attempts by the pterosaurs, and only very precise strikes (perhaps in the head area) will have any chance of subduing the large herbivore before it subdues the reptiles. Female black rhino wins.
3a) 2x 190kg Quetzalcoatlus (wort together) vs 900kg banteng (land battle): The Quetzalcoatlus will stand about 3 times as tall as the banteng's shoulder height. The banteng is a bovid with thick pointed horns. It is a strong herbivore capable of goring any attacker, but it will have trouble defending itself from 2 Quetzalcoatluses intentionally attacking it. The stabs from the pterosaurs' beaks will cause injury, but quite a few will be needed to dispatch the muscular mammal. A strong charge from the banteng will be capable of toppling either reptile, and it will have better mobility and agility than the taller creatures. If the tandem of Quetzalcoatluses work together well, they will be tough adversaries for the single banteng as its focus gets divided. However, the pterosaurs won't be able to easily "chase" the bovid or continually move into a better strategic position because of their limited mobility on land. The banteng will quickly know to stay out of range once it gets struck a couple of times, and it will have a decent chance if it chooses to engage instead of backing off (primarily due to its massive strength and weight advantage). Edge to banteng.
4) 190kg Quetzalcoatlus vs 200kg wild boar (land battle): The Quetzalcoatlus will stand almost 5 1/2 times as tall as the wild boar's shoulder height. Wild boars can be very aggressive, and their sharp tusks can inflict serious injuries to an attacker. They also have tough hides and the ability to run and turn quickly. The wings and "limbs" of the Quetzalcoatlus may be vulnerable to the slashing of the boar's tusks, but the bulk of its body will be difficult for the suid to reach without effort. The quick stabs of the towering Quetzalcoatlus can cause mortal injuries to the wild boar, and it's unlikely the mammal will be able to avoid this fate while attempting to use its tusks offensively. Despite a slight weight advantage and much greater mobility, the wild boar won't have the same level of ammunition at close quarters. Realistically, the boar will avoid this confrontation. Quetzalcoatlus wins.
5) 2x 190kg Quetzalcoatlus (wort together) vs 1200kg Ceratosaurus (land battle): Each of the Quetzalcoatluses will stand approximately 40-45% taller than a standing Ceratosaurus of this size. Like most large theropods, Ceratosaurus was armed with a large set of jaws with sharp teeth to slice and rip flesh. It also had a short horn on its nose that may have been used as a weapon to battle other Ceratosauruses. The stabbing beaks of the pterosaurs may be able to wound the theropod if a vulnerable area is hit, but the necks of these tall creatures are right in range for a single debilitating bite from the Ceratosaurus. The bipedal Ceratosaurus won't have the same level of mobility as the banteng or wild boar in the previous matchups, but its ability to quickly kill each Quetzalcoatlus gives it a chance to prevail. It may get driven away in a realistic scenario, but its massive weight advantage and ability to hunt animals much larger than the Quetzalcoatlus make it too formidable to lose easily. This somewhat depends on how well the pterosaurs will work together. Edge to Ceratosaurus.
6) 190kg Quetzalcoatlus vs 200kg pigmy hippo (land battle): The Quetzalcoatlus will stand about 5 1/2 times as tall as the pygmy hippo's shoulder height. The pygmy hippo is not nearly as intimidating as its much larger cousin (the common hippopotamus), but it does possess large canine teeth in its lower jaw that give it a serious bite. However, the pygmy hippo won't easily be able to reach an area on the Quetzalcoatlus that will cause a significant injury, and it will be in range of the pterosaur's sharp beak before it gets close enough to apply any offense. Quetzalcoatlus wins.
6a) 190kg Quetzalcoatlus vs 200kg pigmy hippo (1.5m deep water): The water level will not be high enough to greatly affect the Quetzalcoatlus' mobility, and the pigmy hippo won't be able to touch bottom without submerging itself. The pygmy hippo will still have trouble mounting an effective offense, and it will still be well in range of the stabbing beak (over 2m long) of the pterosaur. Even with a slight weight advantage, the pygmy hippo won't be very competitive here. Quetzalcoatlus wins.
7) 190kg Quetzalcoatlus vs 2x 65kg rotwailer (land battle) (work together): The standing height of the Quetzalcoatlus will be over 7 times greater than the shoulder height of each Rottweiler. The Rottweiler is a brave, intelligent dog with a broad head and a stocky, powerful body. It has been used by the police and the military. The tandem of Rottweilers will likely rush in to seize the Quetzalcoatlus on areas of its body low to the ground, but a single accurate strike from the pterosaur's long sharp beak can easily put either dog out of commission. It's unlikely the Rottweilers will be able to bring the Quetzalcoatlus down, and that may be their only hope of victory. Quetzalcoatlus wins.
8) 190kg Quetzalcoatlus vs 400kg Nile crocodile (land battle): The Quetzalcoatlus will be slightly taller than the length of the Nile crocodile. Crocodiles are heavily covered in osteoderms (bony growths) that provide protection from injury, and have jaws that can close with a tremendous amount of force. The mobility and stamina of the crocodile is somewhat limited on land, but it can still make sudden, quick movements when it needs to. The power of the Quetzalcoatlus' beak thrusting down is likely enough to injure the crocodile in some areas on its body (especially the head), and the pterosaur can accomplish this without getting in range of the crocodile's jaws due to its great "reach" with its weapon. The crocodile can cause major problems for the Quetzalcoatlus if it clamps upon it with its jaws, but the pterosaur can still stab if it can remain standing. Edge to Quetzalcoatlus.
9) 190kg Quetzalcoatlus vs 100kg American aligator (1.5m deep water): The entire length of Quetzalcoatlus' head will be almost the same length as the entire length of the American alligator's body. The American alligator has the same basic attributes as the crocodile (armor-like hide, vice-like jaws, etc.), but will have a lot more maneuverability and stamina in 1.5m of water than on land. Alligators and crocodiles are capable of drowning terrestrial animals in their weight range at the water's edge, but this alligator will have a hard time seizing an area on the Quetzalcoatlus' body that will enable it to do so. The Quetzalcoatlus will not need a great deal of mobility in the shallow water in order to utilize its stabbing beak, and the downward thrusts of this weapon can be impactive when striking the alligator in its more vulnerable areas (head, belly). Quetzalcoatlus is just too tall and heavy here, and will be a constant threat while the alligator attempts to latch on. Quetzalcoatlus wins.
9a) 190kg Quetzalcoatlus vs 120kg anaconda (2m deep water): The height of the pterosaur will probably be close to the length of the anaconda's body, but many types of constrictors can have vastly different weights at similar lengths. Anacondas are excellent ambush hunters, and are much more effective in the water as fighters than on land. A 120kg anaconda will have the strength in its muscular coils to asphyxiate a 190kg Quetzalcoatlus if it gets into the right position around the thicker part of the pterosaur's body (or its relatively slender neck). The Quetzalcoatlus will probably try to spear or bite the anaconda once it sees it (which can potentially dispatch the snake), but the snake won't be easy to target accurately in this water depth. The Quetzalcoatlus will basically be stationary, and will have a small amount of time to dispatch the snake with its beak before it coils around it. Once the anaconda coils around Quetzalcoatlus, the pterosaur will have no way to remove it, and will be in trouble. The mindset of the anaconda will be important here. It may not readily engage something it feels it can't reasonably swallow, and it may not take the initiative to be aggressive or defensive until it is under attack itself. The force of the Quetzalcoatlus' beak driving down or clamping shut may injure the spine of the anaconda, and the chances of this occurring are probably a little greater than the anaconda's chances of getting an advantageous hold of the pterosaur. Edge to Quetzalcoatlus.
10) 5x 190kg Quetzalcoatlus (wort together) vs 3t female Asiatic elephant (land battle): The elephant's shoulder height will only be about 50-55% of the standing height of each pterosaur, but it will weigh over 3 times as much as all 5 Quetzalcoatluses combined. Elephants of all types are immensely strong and solidly built. The female Asian elephant will be able to use her weight (to crash into or trample) offensively, and the powerful trunk can be an effective tool as well (especially to grab). The sharp, stabbing beaks of the Quetzalcoatlus quintet can potentially cause serious injuries to the elephant, but the ability of the pterosaurs to "work together" will be limited due to their poor mobility on land. The elephant simply moving to a new location in the battle area will take away the Quetzalcoatluses' ability to attack at the same time. What the elephant chooses to do will be important as well. It may simply move away from the towering creatures and stay away from them, or it may get angry at their approach and charge into them like a wrecking ball. If the elephant wants to, she can topple the Quetzalcoatluses simply by using the force of her charge, and this action can potentially break the bones of the pterosaurs. What can happen and what will happen may be 2 different things, but if the elephant is intent on dispatching the 5 reptiles, she will certainly have the means to do so. Female elephant wins.
11) 10x 190kg Quetzalcoatlus (wort together) vs 7t Acrocanthosaurus (land battle): This will be a huge Acrocanthosaurus. One weighing 7t will stand approximately 20% taller than each Quetzalcoatlus. Acrocanthosaurus was a fearsome predatory theropod with large jaws, sharp teeth, and short spine-like protrusions along its back. It regularly preyed upon large animals, including the massive Sauroposeidon (a 40t sauropod). Although Acrocanthosaurus is bipedal, it will have much greater mobility and lateral quickness than the Quetzalcoatluses, and this will make it almost impossible for the pterosaurs to "gang up" on it. A single bite from the deadly jaws of Acrocanthosaurus will easily dispatch any of the Quetzalcoatluses, and the theropod can topple any of the pterosaurs simply by making forceful contact with its 7t body. Its not an impossibility for the 10 Quetzalcoatluses to drive the Acrocanthosaurus away if they are placed very close to it at the beginning of the battle or even overcome it if they are placed in a tight circle around it (and immediately start stabbing), but the theropod will be able to step away and re-engage if it chooses to. The weight comparison between the Acrocanthosaurus and a single Quetzalcoatlus is about the same as comparing a giant panda to a white stork. The theropod is simply too big and dangerous. Acrocanthosaurus wins.
Thank you for the kind words.