"Biome Introduction + List of all identified biomes to this day"

#PokemonGO: Hi guys, For several days now I have been gathering data from the sub to identify all existing biomes.I think the subject is 1- very interesting, 2- quite documented, but 3- not enough widely known to be studied as much as it deserves. So I will try make it more accessible so the knowledge can spread and grow.What is a biome?Biome a property assigned to a spawn-point. A spawn-point can have only one. We talk about biome when several spawn points in the same area share the same biome property.How does this property affect the game?Each time a spawn point spawns a pokemon, its species will be generated according to the current probability chart of its corresponding biome. For example, water biome -> 40% Magikarp, Residential biome -> 20% Pidgey, etc.But how do you identify a biome?1 As a regular player, you "feel" it if you play in different zones where the spawns are noticeably different. 2 Still while playing, you can record every spawns of one or several precise spawn points and compare them between each other. The more you collect data, the more it starts to tend to the biome real spawn rates, and enables identification of the associated biome. 3 You extract data from a big scanner (3rd party app). You can have more easily directly "big data" and identify the spawn rates even more precisely.Is it a nest?No, but nest is also a property of a spawn-point. If a place is "chosen" to be a part of a nest (typically all the spawn points in a park are part of 1 nest), then this point will spawn the regular biome pokemons 75% of time, and one precise pokemon 25% of time. This single pokemon change every 2 Thursday. Nests and biomes work complementarily. Hunt in a nest for one species, hunt in a biome for several species. Be careful though when studying them because some nests can be reduced to only one single spawn-point, and can be easily missed and undeclared on The Silph Road.Why care so much?In Pokemon GO, some people want to have the best mons, others hold the most gyms, or have the maximum level. Some players just play for the fun with their kids, or to kill time while walking their dog. I find that nice that you can enjoy the game in such different ways. But personally, and I think for a vast amount of players, my priority in the game is to complete the regional Pokedex. Living in the city, I managed to do so for gen1 quite easily before the end of 2016, without caring much of biomes. But I guarantee that the "difficutly" to do so for gen2 has been voluntarily increased. Getting a Tyranitar + Ampharos need some serious grinding, even with the "best" biome for it (+ they don't "nest"). Here plays the biome. If your priority is to finish your dex as me, with the biomes analysis, you will be able to know where to look for.Can a spawn point change the biome it belongs to?Evidence suggest NO. BUT: 1 It is now widely admitted that areas can have spawns points from several biomes. I personally live in an area mixing two different biomes. 2 Without changing of biomes, the spawn rate change some times (worldwide) : see next point.Spawn rates changes within biomesSince the game launch last year, spawn rates migration have been recorded ("blend changes") For example, on November 2nd, the famous "Drowzee Biome" had divided the Drowzee spawn rate by 6! To the extent that a new name had to be found. Last blend change was around 5th of March, and the one before was for gen2 launch on 16th of February (gen2 was temporarily more frequent). I personally don't know all the blend changes. Always take this feature in consideration when analyzing biomes and older studies!How exactly does biome property affect the spawn-point (Tier rarity)?A recent theory suggests that Spawns of each biome follow Tiers, just like it has been proven with eggs. Evidence show that percentage are not that simple, but tend to follow a seem-alike rule of tiers. Tiers are: Common, Uncommon, Rare, Very rare. For example, Swinub is common in some areas, while rare or very rare in some others. I personally think this participates in the greatness of the game, because it makes you (and me ) look for adventure and travel to new places - not mentioning the region-exclusives.So what is the list of the biomes?I identified 10 biomes. Their names aren't fully "normalized" yet so I have tried to gather all commons name you can find:Biome NameAlternative NamesCommon and Uncommon SpawnsDesert BiomeArid/Fire/Desert BiomeSnubull, Ekans, Sandshrew, Growlithe, MankeyBug BiomeBush BiomeSpinarak, Eevee, VenonatWater-1 BiomeMagikarp BiomeMagikarp, Psyduck, SlowpokeWater-2 BiomePoliwhirl, Staryu, Horsea, Krabby, MarillWater-3 BiomeForest/River/Swamp BiomeSquirtle, TotodileElectric BiomeCoast BiomeMagnemite, VoltorbIce BiomeOcean/Psy/Drowzee BiomeShellder, Seel, Swinub, Jynx, DrowzeeGrass BiomeBulbasaur, Chikorita, Pinsir, Tangela, DodrioMountainClefairy BiomeClefairy, NidoranNeutral BiomeResidential/Rural/Base/No-biome BiomeAipom, Murkrow, NatuMore biomes?I created this biome list from my experience and other people studies. Let me know if you know more or if existence of more variant have been quantitatively observed (I heard about a Mysterious Fossil biome spawning more frequently Omanyte and Kabuto, also not 100% sure about the 3 variants of water biome).So what about rares?Just like not-so-rare pokemons, rares one tend to spawn in some biomes more than others. This has been widely analyzed by bezoarboy (link below). For example a Dragonite will be rare for anybody (don't expect someone living in a place where Dragonite spawn like Pidgey, this thankfully doesn't exist), but if a Dragonite spawns, there is 66% chance that this happens in a mountain biome. I personally found several of them, always while travelling into mountain biomes. This study suggest also that Dodrio is likely to spawn 99% of the time in a Bug Biome.Valuable sources:Electric biomes Spawn rates: http://ift.tt/2mHGdWi on Biomes-Tiers: http://ift.tt/2n20wjI of 6 biomes: http://ift.tt/2mHsbnH you wanna check out only one link, go to this wonderful job of identifying not only 6 biomes, but also literally a guide to which biome belong ALL rare pokemon from gen1 http://ift.tt/2n1YdNu Blend Change: http://ift.tt/2mHK6dI biome blend change: http://ift.tt/2n2jk2r I found 10 biomes identified to this day. Learning to recognize them enables you to hunt efficiently rares pokemons. To this day, it is a pretty solid list. Let me know if you can identify another biome. via /r/TheSilphRoad http://ift.tt/2mHzHyB