Editing 1792: Bird/Plane/Superman

This comic is a logical comparison of observations to resolve the [http://www.imdb.com/title/tt0034247/quotes?item=qt0317455 classic Superman catchphrase] of comic book bystanders: "Look, up in the sky... It's a {{w|bird}}!... It's a {{w|Airplane|plane}}!... It's {{w|Superman}}!", hence the title. Superman, a character originally created for comic books in the 1930's, is an alien with superpowers, including the power of unaided flight; hence the catchphrase exclaiming peoples' amazement.  

At the correct distance both birds, planes and the fictive Superman could be mistaken for each other. So this comic aims to help people identify the airborne object by listing on which properties they are alike and on which they are different. This problem was also mentioned in the title text of [[1633: Possible Undiscovered Planets]], putting Superman near the bird/plane boundary explaining why all this confusion has arisen.

The observations compared range from the mundane to the bizarre and they are listed and explained i details below in the [[#Table|table]]. Here some highlights are mentioned, but for all these there are much more detail below.

Some of the mundane observations are that birds do fly around with people, while Superman can do it, and planes are meant for it;  and that the latter two are new "inventions", whereas birds have flown around for millions of years.  

Interestingly enough there are actually two observations that have check mark for all three; the first being that there are enthusiasts for all three different flying objects. And these will obsess over small color details in otherwise similar looking objects. The other common thing is that they all may have sex in midair. It is, however, a misconception that birds have sex in midair. The possibility of that happening for the others two are discussed in the table.  

There are also three direct jokes towards the bottom. The first is that {{w|David Attenborough}} may also have observed Superman's mating habits just like he has with birds in the documentary series {{w|The Life of Birds}}. The second is that not only birds poop in flight, but that Superman could and would also do so. And the third (and also final observation) is that not only birds chase insects to eat them, but also Superman chase them... though only when he is bored. These last three observations have that in common that the planes are left out of all of them, and the joke is always on Superman. As it has been before in [[1384: Krypton]] and [[1394: Superm*n]] (released just ten comics apart).

The title text refers to black stickers (decals) in the shape of an easily recognizable predatory bird, like {{w|falcons}} to enhance the visibility of clear glass windows or doors and scare smaller birds away before they crash into the window. This may actually not work very well according to this article: [https://www.allaboutbirds.org/why-birds-hit-windows-and-how-you-can-help-prevent-it/ Why Birds Hit Windows], where a falcon decal is also shown. But they are meant to warn birds away and according to this comic they could also prevent Superman from flying through your window (and thus also stop him from possibly just continue through the building). They are not known to affect the risk of airplanes flying into the building.

! !! Bird !! Plane !! Superman !! Explanation

| Carries people || || ✓ || ✓ || Some birds are capable of flying of while carrying a small human away, but this happens extremely rarely (although hoax stories are often reported).  Of course an {{w|Ostrich}} can easily carry a human they have done so often in arranged {{w|Ostrich#Racing|races}}. But as they cannot fly (with or without humans on their back), and this comic is about recognizing objects in the air, this will not affect the check mark!<br><br> Most planes are specifically designed to carry human passengers, although many are cargo planes with humans only acting as crew, and autonomous drones without humans also exist. <br><br>Superman often carries other people with him, such as his {{w|Lois Lane|girlfriend}}, rescued victims or the various villains that people need to be rescued from.

| Often flies in groups || ✓ || ✓ || || Many types of birds fly in flocks, particularly during long-range {{w|Bird migration|migrations}}. Some birds often fly in the {{w|V formation}} which has also been {{w|V_formation#Military_flight_missions|copied by planes}}. This formation has been used at least twice in xkcd in [[1440: Geese]] and recently in [[1729: Migrating Geese]] (notice the similarity in number of that bird comic compared to the one for this comic).<br><br>Planes sometimes fly in {{w|Formation flying|group formation}}, particularly when engaged in military operations where mutual support is tactically useful (or when conducting practice maneuvers for such operations). Though the people who would mistake those plains for bird will mainly see this at {{w|Air show|air shows}}. <br><br>Superman is a unique person, and thus does not fly in groups of Supermen. While Superman occasionally operates alongside other flying superheroes, and in some stories is duplicated or split into multiple beings, Randall apparently considers these circumstances too unusual to meet the "often" qualifier.

| Created in 20th century || || ✓ || ✓ || Birds evolved from dinosaurs, appearing as early as the Late Jurassic period, roughly 150 million years ago. That birds evolved from dinosaur who also had wings with feathers before they evolved on to becoming birds has often been referenced by Randall in comics like [[1104: Feathers]], [[1211: Birds and Dinosaurs]] and the title texts of [[867: Herpetology]] and [[1527: Humans]]<br><br>The {{w|Wright_Flyer#Flight_trials_at_Kitty_Hawk|first successful flight}} of a powered heavier-than-air craft took place on December 17, 1903 and was performed by the {{w|Wright brothers}}. There are several other claims for the first such flight, for instance {{w|Alberto_Santos-Dumont#Heavier-than-air_craft|Alberto Santos-Dumont}} from Brazil [https://youtu.be/N_qXm9HY9Ro?t=2156 was given a spot] at the {{w|2016 Summer Olympics opening ceremony|opening ceremony}} of the {{w|2016 Summer Olympics|Rio 2016 Olympic Games}}<br><br>Superman first appeared in {{w|Action Comics 1|''Action Comics'' #1}}, published in June 1938.

| Uses magnetic navigation || ✓ || ✓ || || Some types of birds use {{w|magnetoreception}} to navigate using the earth's magnetic field as a guide. <br><br>Artificial {{w|Compass#Magnetic_compass|magnetic compasses}}, along with other navigational equipment, are used by planes. <br><br>Superman, while possessing a {{w|Powers and abilities of Superman|plethora of super-senses/powers}}, does not appear to be particularly sensitive to {{w|magnetism}}.

| Enthusiast community obsesses over small coloration details || ✓ || ✓ || ✓ || {{w|Birdwatching|Birdwatchers}} identify bird species by a range of characteristics, including small details in the bird's color pattern which identify one species apart from another.<br><br> Similarly, airplane hobbyists and {{w|Aircraft spotting|plane spotters}} take note of the colors of a plane's paint job and insignia. <br><br>Comics fans can similarly identify the artist and date of a depiction of Superman by the coloration and configuration of his costume and be obsessed with their favorite coloration being the canon.

| Preyed on by cats || ✓ || || || {{w|Cats}} kill several billion birds a year, often - but not always - eating them. <br><br> There has never been a case of a cat successfully catching and eating a plane.<br><br>As Superman is a fictional character the same goes for him, but also in the comics he has never been eaten by a cat, although he has been [http://www.themarysue.com/wp-content/uploads/2011/03/power-girl-22.jpg devoured by a dinosaur] although that (probably{{Citation needed}}) did not kill him...

| Occasional mid-air sex || ✓ || ✓ || ✓ || A common misconception seems to be that birds sometimes have sex in flight. But according to this article [http://www.livescience.com/38379-animal-sex-bird-sex.html Animal Sex: How Birds Do It] they cannot do it, and in this article [http://animals.howstuffworks.com/birds/hummingbird-sex1.htm Do hummingbirds have sex in midair?] it is explained that even ''{{w|hummingbirds}} don't actually mate in midair''. <br><br>{{w|Mile high club|Mid-air sex}} involving planes usually involves passengers (and potentially air crew), not the plane itself.  However, this could also be a metaphorical reference to {{w|Aerial refueling|in-flight refueling}} (such as the depiction, set to romantic music, in [https://www.youtube.com/watch?v=Qs7EikHQGlA the opening scene] of the movie ''{{w|Dr. Strangelove}}'', a movie Randall has referenced before for instance in [http://www.explainxkcd.com/wiki/images/2/21/1608_1020x1083y_Torpedoes_two_steps_above_Runner_with_Beret_Guy.png this scene] from [[1608: Hoverboard]]) It could also refer to [http://avstop.com/news/plantcity.html this incident] where one plane landed atop another in mid-air. <br><br>As for Superman, there have been occasional moments in the comics which indicate or at least imply that he sometimes engages in mid-air sex.{{Citation needed}}

| Eaten during seasonal feasts || ✓ || || || {{w|Turkey (bird)|Turkeys}}, a type of bird, are eaten by Americans during {{w|Thanksgiving}}, a "seasonal feast" held on the fourth Thursday of November of each year. Britons eat Turkey or {{w|Goose}} at {{w|Christmas}}, in other countries it may be {{w|ducks}} instead.<br><br>It is unlikely that normal humans would eat a plane, however it has been done by {{w|Michel Lotito}} who has digested an entire {{w|Cessna 150|Cessna}} aircraft. However he used two years to consume the plane, so although he may have eaten some parts during holidays, he did not do it because there was a seasonal feast.<br><br>Superman is too strong and "made of steel" for him to let any human eat him. But as also mentioned above he has been [http://www.themarysue.com/wp-content/uploads/2011/03/power-girl-22.jpg devoured by a dinosaur] although that probably did not kill him... Referring back to the possible sex Superman has had in flight, it seems he is able to have sex with a human. Although the slang ''{{w|Cunnilingus|eat me}}'' (link NSFW), usually mean the man eating the woman,[http://www.urbandictionary.com/define.php?term=eat%20me it can also be used] the other way around. In this case Superman could have had holiday-sex with his girlfriend, where she ate him.

| Propelled by flapping || ✓ || || || Birds fly by flapping their wings. <br><br>Planes have fixed wings, and fly by maintaining forward velocity and exploiting the aerodynamic effects of air flowing over the upper and lower wing surfaces, which are shaped and angled to produce lift. <br><br>Superman flies using superpowers which require neither wings nor flapping.

| Sometimes loses ability to fly, needs to sunbathe to regain it || ✓ || || ✓ || Birds can "lose" the ability to fly, if their wings are weighed down by water from swimming. One way for birds to dry out their wings is to [http://birding.about.com/od/birdbehavior/a/Bird-Sunning.htm sunbathe]. <br><br> An airplane can lose its ability to fly, but no issues occurring in modern aircraft can be fixed by sunbathing, except in some {{w|Solar Impulse|experimental solar-powered aircraft}}. So this is actually wrong as these planes would loose their ability to fly if left too long without exposure to the sun, and the problems would be fixed with a sunbath. <br><br>One of Superman's superhero abilities is the ability to fly. However, he may lose this ability with prolonged exposure to {{w|Kryptonite}}, which make him weak. Also the rays from the sun at his home planet {{w|Krypton (comics)|Krypton}} can {{w|Superman_II#Plot|remove his super powers}} as it happened in {{w|Superman II}}. Superman's ability to fly is a superpower caused by "electromagnetic radiation from the rays of a yellow sun", so he could regain his strength and superhuman abilities through sunbathing in the {{w|Sun|Sun's}} light here on Earth. Which was how he got his super powers in the first place.

| Can take a punch || || ✓ || ✓ || Many birds are small and fragile creatures, whose {{w|Bird_anatomy#Skeletal_system|bone structures}} are meant to be light in order to fly, and thus are not very durable. If a man punched, say, a {{w|pigeon}}, he could probably break/dislocate most of its bones, either killing it immediately or leaving it in a state from which it will probably never ever recover on its own. However, there are definitely some big, {{w|flightless birds}} that could take a punch from a human such as ostriches and {{w|emus}}, but since both are large creatures that would probably react by fighting back, it would not be wise to try. Also Randall is (again) plainly ignoring this type of birds as they cannot fly and this comic is about making mistakes regarding things flying through the air (typically far enough away from the observer to mistake a pigeon for a plane). <br><br>Planes are usually massive, or at least big enough to carry a human, and have to be made of materials durable enough to withstand hurtling through the sky at hundreds of miles an hour reliably on a regular basis. You could definitely punch one safely. (Meaning safe for the plane, not your hand.) <br><br>One of Superman aka the {{w|Man of Steel (film)|Man of steel}}'s trademark abilities is his near indestructibility; a punch from any regular human would not hurt him, but again hurt the hand.

| Mating behavior often observed by a hidden David Attenborough || ✓ || || Not that we know of || {{w|David Attenborough}} is an English broadcaster and naturalist, who produced a documentary series ''{{w|The Life of Birds}}''. Included in the series is an episode entitled "Finding Partners", which discussed {{w|Bird#Breeding|mating rituals of birds}}. That these can be very strange has been mentioned in the title text of [[1747: Spider Paleontology]], of course in relation to Dinosaur behavior. <br><br>Planes are dead inanimate objects with no mating behavior. However, referring back to the observations made under the ''Occasional mid-air sex'' explanation it could be discussed if this was mating behavior. Also there are movies like {{w|Planes (film)|Planes}} and it's {{w|Planes: Fire & Rescue|sequel}} has living planes, which could mate. But Randall may know for sure that Attenborough is not interested in those. <br><br>The comic states that we don't know for sure if Attenborough has observed Superman's mating behavior. As Superman doesn't exist{{Citation needed}} Attenborough has not seen Superman in reality (which would lead to a "No" response), but maybe Attenborough has watched all the movies in which Superman courts {{w|Lois Lane}} just to observe Superman's (made up) mating behavior (which would lead to a "Yes" response). Since we do not know Attenborough's habits, this leads to Randall giving the "Not that we know of" response.

| Capable of intentionally releasing poop mid-flight || ✓ || || ✓ || Birds often poop during flight, often enough that people regularly get hit in the head by the poop, which has caused the unlucky people to come up with the [http://thepetwiki.com/wiki/Pets_and_Superstitions superstition] that it brings good luck. For birds it is just economical to shed excess mass when they are going to fly, and many birds poop just at take off. But on long flights it the best use of resources to not carry extra weight along, that increases their efficiency. Unlike {{w|mammals}} who pee {{w|urea}}, {{w|Bird#Excretory_system|bird poop}} is both pee and feces as birds only have one hole a {{w|cloaca}}, and the black poop is surrounded by their pee which is the white stuff containing {{w|uric acid}}. Not peeing lots of water out reduces their water loss.  <br><br>Some planes may be able to intentionally purge their septic tanks mid-flight, depending on the design of the waste interlocks, especially assuming the controls are inside the cockpit or cabin.  As the TV show ''MythBusters'' has shown, a leaky septic disposal system can unintentionally lose liquid waste and cause a "blue ice" sighting on the ground. This is, however, not the planes poop and also not the plane that released it intentionally, and planes are not supposed to do this. <br><br>Superman, being more or less human, could be capable of pooping during flight, but this would generally result in unnecessary drycleaning bills. But he has probably never been shown to either take a leak or poop in any of the {{w|Canon (fiction)|canon}} comics, books or films{{Citation needed}}. So he may not even be able to poop! But Randall assumes he can.

| Chases and eats bugs || ✓ || || Only when bored || Many bird species prey on insects and similar-sized animals. <br><br>Planes often fly into and kill insects (as well as birds, and sometimes humans), but this is unintentional and doesn't provide them with nutritional value, and they certainly do not chase them around. <br><br>Superman is not known for eating insects, but Randall implies that he does sometimes, but only when he's bored. This could be interpreted as if he then tries to avoid his boredom by chasing the bugs intensionally, but why also eat them then? So it would probably rather happen because if you fly around while bored you might yawn at the wrong time and {{w|There Was an Old Lady Who Swallowed a Fly|swallow a fly}}, just like when riding on a bike or any other relatively fast but open vehicle.  

| Mating behaviour often observed by a hidden David Attenborough || ✓ || || Not that we know of