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− | {{ | + | {{Migrated_article}} |
− | {{av}} | + | {{quality|Exceptional|21:11, 20 August 2010 (UTC)}}{{av}}{{buggy}} |
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− | + | Immigration can occur at any time once per season. Smaller migrant waves of 2 to 10 arrive in early seasons, followed by a large wave in the low double digits in the second spring, one year after embark (the maximum wave size reported to date is [http://www.reddit.com/r/dwarffortress/comments/q580c/hole_shit/ 77]). The first 2 migrant waves are hardcoded and will appear under any circumstances, unaffected by fortress wealth or even the extinction of their home civilization. Each group of migrants will often include domestic animals, including both pets and stray livestock. Many also include [[child]]ren. Be prepared with adequate [[food]], [[alcohol|drink]], and [[bed]]s, among other things. | |
− | + | Migrants will often have skills that match your fortress' needs — migrants with skills your fortress uses a lot or skills that your fortress doesn't have at all are more likely to show up at your gates. Important skills (mining, food production, and basic crafting, according to Toady) are weighed more heavily than other skills.<sup>[http://www.bay12games.com/media/df_talk_12_transcript.html Source] {{dot}} [http://www.bay12games.com/media/Dwarf_Fortress_Talk_12.mp3 MP3]</sup> | |
− | + | Migration waves are generally a good thing — if you're prepared for them. | |
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− | + | == Labor preferences == | |
− | Some immigrants are [[historical | + | Each migrant can arrive with a wide collection of often unrelated skills, far greater than possible with one of the [[starting build|starting 7 dwarves]], and [[experience]] levels as high as Legendary. |
+ | Any and all skills might be represented, including obscure military skills (like [[blowgunner]]), high levels of one or more [[social skill]]s, [[crutch walker]], [[concentration]] and others. It's even possible to have dwarves with skills that may not be obtainable by other means, like [[military tactics]] or [[tracker|tracking]]. | ||
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+ | As of v0.34.03, migrants may arrive with all labors except hauling, cleaning, recovering wounded, and caring for wounded disabled, depending on the settings one has entered into [[d_init.txt]]. | ||
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+ | == Historical migrants == | ||
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+ | Some immigrants are [[legends|historical]] figures. These immigrants come to your fortress with skills representing their history, and may come to your fortress with wounds they have suffered during [[world generation]]. Immigrants may even be [[vampire]]s. | ||
==Limiting/preventing immigration== | ==Limiting/preventing immigration== | ||
− | + | If the fortress population exceeds the population cap when the dwarven [[liaison]] is visiting he will note that you don't want any more dwarves. On his safe return to the dwarven homeland, he will "report" your population, and if that number exceeds the setting of the POPULATION_CAP option in [[d_init.txt]], no new migrants will be sent. You can stop migration by setting that cap to a number lower than the population at the time of the last liaison visit. If births or immigration put you over the limit after the liaison visited, you will still receive migrants, because only the reported population is taken into account. | |
− | The number of migrants depends on the [[wealth|created wealth]] of your fortress and is affected by your dwarves' activities. Note that if your fortress should ever become a mountainhome, you will receive an additional migration wave with the promotion, regardless of your population cap. The number of migrants is affected by how far below the population cap your fortress | + | The first two immigrant waves are hardcoded so you will always receive them, and if you have fewer than 4 dwarves POPULATION_CAP is ignored {{Verify}}. The number of migrants depends on the [[wealth|created wealth]] of your fortress and so is affected by your dwarves' activities. Note that if your fortress should ever become a mountainhome, you will receive an additional migration wave with the promotion, regardless of your population cap. The number of migrants is not affected by how far below the population cap your fortress was. One dwarf short, or twenty - it's all the same. |
− | It is worth noting that you need a certain minimum population size before any of your dwarves will experience [[strange mood]]s. | + | It is worth noting that you need a certain minimum population size before any of your dwarves will experience [[strange mood]]s. Additionally, POPULATION_CAP affects only migration, it has no effect on pregnancies. You will need to alter BABY_CAP in order to limit births. |
− | To reiterate, the population cap is a | + | To reiterate, '''the population cap is not a hard limit on the number of dwarves in your fortress'''; It is a soft cap on immigration that only is checked when a liaison successfully reports back to your home civ. If a player is as little as 1 dwarf under their population cap when the liaison leaves, they will be eligible for a full year of normal immigration. As such, it is recommended that players set their population cap at 20-30 dwarves below the number of dwarves they actually want in their fort. |
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+ | There is an open bug where it seems that for some people POPULATION_CAP doesn't work at all.{{Verify}}{{Bug|2922}} | ||
==Immigration mechanics== | ==Immigration mechanics== | ||
− | The date on which immigrants appear in a season | + | The date on which immigrants appear in a season seems to be fixed at the start of that season, but the number of immigrants and their skills are determined when the migrant wave arrives. |
− | + | There is never a migration in the first winter. There won't even be a {{DFtext|The fortress attracted no migrants this season|DarkGoldenRod}} message. | |
− | Migrant skill levels seem to depend on the size of the home civilization; a difference will be noticed if you picked a dwarven civilization that was not well | + | Migrant skill levels seem to depend on the size of the home civilization; a difference will be noticed if you picked a dwarven civilization that was not well established (few towns or none) compared to a well established one. |
− | The two | + | ==Migrant wave sizes== |
+ | The first two migrant waves have a minimum size of 1, if it has a relative in your group already, and a maximum size of 10. The size of these waves are unaffected by fortress wealth. | ||
− | + | The third migrant wave and on are influenced by the [[wealth|created wealth]] of the fortress, with more wealth attracting more immigrants (more research is needed to determine specifics). Specifically, they're influenced by the fortress wealth as reported by the last outgoing dwarven [[caravan]]. Wealth created after the caravan leaves has no influence until the next year's caravan leaves. If the caravan fails to make it out then the fortress' wealth is not reported. The dwarven [[liaison]] does not report on fortress wealth, in those circumstances where the liaison makes it out but the caravan doesn't. | |
− | + | Imported wealth, caravan sales figures, absolute caravan profit and caravan profit margin either have no effect on migration numbers, or only have an effect by applying a percent modification to the numbers driven by created wealth. If a fortress manages to [[trading|trade]] (not offer) away 100% of its created wealth then no immigrants will come the next season. More research is needed to determine if the aforementioned statistics have any influence on migration numbers. | |
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− | Imported wealth, caravan sales figures, absolute caravan profit and caravan profit margin either have no effect on migration numbers, or only have an effect by applying a percent modification to the numbers driven by created wealth. If a fortress manages to [[trading|trade]] (not offer) away 100% of its created wealth | ||
One factor which is known to affect migrant wave size is the total size of your fortress's {{k|u}}nits list (all 4 categories), which consists of dwarves, invaders, merchants, and animals which either died or currently live at your fortress. As this number increases, the maximum size of migrant waves will be reduced: starting at a local population of 1000, migrant wave sizes are limited to 10, and at subsequent levels of 1300, 1600, 1800, 2000, 2200, 2400, 2600, 2800, and 2900, the limit is decreased by 1, and once you reach a local population of 3000 you will cease to get migrants at all. | One factor which is known to affect migrant wave size is the total size of your fortress's {{k|u}}nits list (all 4 categories), which consists of dwarves, invaders, merchants, and animals which either died or currently live at your fortress. As this number increases, the maximum size of migrant waves will be reduced: starting at a local population of 1000, migrant wave sizes are limited to 10, and at subsequent levels of 1300, 1600, 1800, 2000, 2200, 2400, 2600, 2800, and 2900, the limit is decreased by 1, and once you reach a local population of 3000 you will cease to get migrants at all. | ||
− | + | Kurik Amudnil created a DFHack script to prevent the latter from happening, by clearing (and storing, so that it can be restored as wanted) the dead units list of uninteresting creatures. It is available [http://www.bay12forums.com/smf/index.php?topic=91166.msg4336893#msg4336893 here] and is also included in the [[Utility:Lazy_Newb_Pack|Lazy Newb Pack]]. | |
− | + | ==Adventure mode== | |
+ | In certain locations in [[adventure mode]], you may come across a '''Migrating Group'''. One such location is near a recently [[abandon|abandoned]] [[fortress]]; choosing to travel to the group will allow you to talk to the members of your former fortress as they travel back to dwarven civilization. | ||
==Fortress Failure Migration== | ==Fortress Failure Migration== | ||
− | If a fortress is abandoned during [[unhappy]], [[ | + | If a fortress is abandoned during [[unhappy]], [[Main:stark raving mad|stark raving mad]] times the citizens can migrate to your new fortress still stark raving mad (berserk possibly, further looking into required). |
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==Bugs== | ==Bugs== | ||
− | + | If any migrants to your fort were formerly traders or soldiers with a trade caravan, then they will be marked as a "friendly" Trader, stand around at the map edge for a while (blocking the rest of the migrants, and caravans or even a Monarch), and then wander around randomly, unable to be assigned labors. {{Bug|5098}} [[Utility:DFHack|DFHack]] includes a command "tweak fixmigrant" as a workaround for this bug. This bug occurs most often if your starting dwarven civilization at embark is a very small one with few or even no towns at all. | |
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− | + | Also, some migrants will be incorrectly listed as babies or children, when they are not in the expected age range for those categories. This will automatically fix itself when they have their next birthday. Some baby migrants may have future birth dates. {{Bug|3945}} | |
− | {{ | ||
− | + | You might have a situation where a single migrant can't find the fort and just stands at the edge of the map, not moving at all. | |
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{{Category|Dwarves}} | {{Category|Dwarves}} | ||
{{Category|World}} | {{Category|World}} | ||
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+ | {{Starting FAQ}} |