1: Breed status

Supplementary Table A. Danish national breeds population size and conservation status.

Breed/Most common name	English/other name	Specie	Year (data)	Population size	Breeding males	Breeding females	Conservation Status	Source
Rød Dansk Malkerace	Danish Red Dairy Cattle	Cattle	2017	74 344			Not at risk	DAD-IS
Agersøkvæg	Agerso Cattle	Cattle	2023	152	17	125	Critical	DAD-IS
Jysk Kvæg	Jutland Cattle	Cattle	2023	1095	139	750	Endangered	DAD-IS
Dansk Malkekorthorn	Danish Shorthorn	Cattle	2023	790	98	441	Endangered	DAD-IS
Rød Dansk Malkerace anno 1970 (RDM-1970)	Danish Red Dairy Cattle anno 1970	Cattle	2023	408	28	265	Critical	DAD-IS
Sortbroget Dansk Malkerace anno 1965 (SDM-1965)	Danish Black Spotted Dairy Cattle anno 1965	Cattle	2023	339	21	217	Critical	DAD-IS
Danske Landhøns	Danish Landrace Chicken	Chicken	2017	2100			Vulnerable	DAD-IS
Broholmeren	Danish Mastiff	Dog	2023	87			Endangered	DAD-IS
Dansk Spids	Danish Spitz	Dog	2023	550-600	59	61	Critical	DAD-IS
Gammel Dansk Hønsehund	Old Danish Pointer	Dog	2023	102-200			Endangered	DAD-IS
Sort hvidbrystet dansk and	Danish Landrace Duck	Duck	2017	50			Critical	DAD-IS
Dansk Landraceged	Danish Landrace Goat	Goat	2022	1465	316	1060	Vulnerable	DAD-IS
Grå og Gråbrogede Danske Gæs	Danish Landrace Goose	Goose	2017	125			Endangered	DAD-IS
Den Jydske Hest	Jutland Horse	Horse	2023	1462	615	758	Endangered	DAD-IS
Frederiksborgheste	Frederiksborg horse	Horse	2023	1542	574	763	Endangered	DAD-IS
Knabstrupper	Knabstrupper horse	Horse	2023	1736	629	969	Endangered	DAD-IS
DL-1970	Danish Landrace Pig anno 1970	Pig	2023	28-43	5	10	Critical	DAD-IS
Sortbroget Landracesvin	Danish Black Spotted Pig	Pig	2023	174-278	22	82	Critical	DAD-IS
Parykduen	Paryk dove	Pigeon	2017	200			Endangered	DAD-IS
Svaberduen	Svaberg dove	Pigeon	2016	280	70	70	Critical	DAD-IS
Tumlingeduen	Tumlinge dove	Pigeon	2017	750			Endangered	DAD-IS
Hvid Dansk Landkanin	Danish White Landrace rabbit	Rabbit	2023	450-600	25	75	Critical	DAD-IS
Dansk Landfår	Danish Landrace Sheep	Sheep	2023	1326	370	916	Endangered	DAD-IS
Hvithovedet Marskfår	Marsh sheep	Sheep	2022	802	173	620	Endangered	DAD-IS
Grønlandshund	Greenland dog	Dog	2022	13 123			Undefined	External¹

¹ Source: Total number of sled dogs in Greenland (i.e. not just pure bred Greenlandic dogs), Statbank Greenland (bank.stat.gl)

Supplementary Table B. Finnish national breeds population size and conservation status.

Breed/Most common name	English/other name	Specie	Year (data)	Population size	Breeding males	Breeding females	Conservation Status	Source
Finnish Ayrshire	Finnish Ayrshire	Cattle	2023	60 000-100 000		75000	Not at risk	DAD-IS
Itäsuomenkarja	Eastern Finncattle	Cattle	2023	1800-3500	70	2000	Endangered maintained	DAD-IS
Länsisuomenkarja	Western Finncattle	Cattle	2023	1000-1200		1100	Endangered maintained	DAD-IS
Pohjoissuomenkarja	Northern Finncattle	Cattle	2023	800-900		850	Endangered maintained	DAD-IS
Maatiaiskana	Finnish Landrace Chicken	Chicken	2023	5000-6000	900	5000	Not at risk	DAD-IS
Karjalankarhukoira	Karelian Beardog	Dog	2019	4000-8000	90	110	Endangered	DAD-IS
Lapinporokoira	Lapponian reindeer herder	Dog	2019	1500-2000	40	60	Critical	DAD-IS
Suomenajokoira	Finnish Hound	Dog	2019	14 000-23 000	200	340	Endangered	DAD-IS
Suomenlapinkoira	Finnish Lapponian Dog	Dog	2020	8000-1100	150	210	Endangered	DAD-IS
Suomenpystykoria	Finnish Spitz	Dog	2019	4000-8000	130	200	Endangered	DAD-IS
Suomenvuohi	Finngoat	Goat	2023	3000-4000	70	3000	Endangered	DAD-IS
Suomenhevonen	Finnhorse	Horse	2024	19 000-20 000	219	1549	Endangered	DAD-IS
Ahvenanmaanlammas	Aland sheep	Sheep	2023	4500-4750	610	4100	Vulnerable	DAD-IS
Kainuunharmas	Kainu sheep	Sheep	2023	4000-5500	610	4600	Vulnerable	DAD-IS
Suomenlammas	Finnsheep	Sheep	2023	40 000-45 000	4200	38000	Not at risk	DAD-IS
Finnish landrace cat	Finnish landrace cat	Cat					Undefined	No data

Supplementary Table C. Faroese national breeds population size and conservation status.

Breed/Most common name	English/other name	Specie	Year (data)	Population size	Breeding males	Breeding females	Population trend	Source
Færøsk hest	Faroese horse	Horse	2023	82	28	31	Decreasing	Both¹
Færøsk får	Faroese sheep	Sheep	2017	75 000			Undefined	DAD-IS
Føroysk dunna (Færøsk and)	Faroese Duck	Duck					Undefined	No data
Føroysk gás (Færøsk gås)	Faroese Goose	Goose					Undefined	No data

¹ Source: Total population size. Føroya Fongur (Faroese Horse Associasion Database)

Supplementary Table D. Icelandic national breeds population size and conservation status.

Breed/Most common name	English/other name	Specie	Year (data)	Population size	Breeding males	Breeding females	Conservation Status	Source
Icelandic cattle	Icelandic cattle	Cattle	2022	79 306		25842	Not at risk	DAD-IS
Islanski hænsnastofninn	Icelandic landrace chicken	Chicken	2018	3000-3500	300	3200	Endangered*	DAD-IS
Icelandic goat	Icelandic goat	Goat	2022	1875			Endangered maintained	DAD-IS
Islenski Hesturinn	Icelandic horse	Horse	2022	53 015		4147	Not at risk*	DAD-IS
Icelandic Leadersheep	Icelandic Leadersheep	Sheep	2022	1200-1500			Endangered maintained	DAD-IS
Icelandic Sheep	Icelandic Sheep	Sheep	2022	365 290		287000	Not at risk	DAD-IS
Íslenski hundurinn	Icelandic sheepdog	Dog	2023	162			Endangered*	External¹

¹ Source: Puppies registered in Iceland in 2023 (Icelandic sheep database: islenskurhundur.com)
* Risk categories marked with asterisk was not correct in DAD-IS and was updated based on information from the National Coordinator on Animal Genetic Resources in Iceland.

Supplementary Table E. Norwegian national breeds population size and conservation status.
This list divereges slightly from the official Norwegian list of native livestock breeds. The divergence is mainly explained by more poultry breeds and no cat breeds in the official list. The official list of livestock breeds native to Norway is published in the annual report Nøkkeltall fra Norsk genressurssenter

Breed/Most common name	English/other name	Specie	Year (data)	Population size	Breeding males	Breeding females	Conservation Status	Source
Norsk Rødt Fe (NRF)	Norwegian red cattle	Cattle	2022	175 975		175975	Not at risk	DAD-IS
Doelafe	Dola cattle	Cattle	2022	405	55	350	Endangered maintained	DAD-IS
Østlandsk rødkolle	Eastern red polled cattle	Cattle	2022	612	38	574	Endangered maintained	DAD-IS
Sidet trønderfe og nordlandsfe	Coloursided tronder and nordland cattle	Cattle	2022	2352	178	2174	Endangered maintained	DAD-IS
Telemarkfe	Telemark cattle	Cattle	2022	582	76	506	Endangered maintained	DAD-IS
Vestlandsk fjordfe	Western fjord cattle	Cattle	2022	1419	127	1292	Endangered maintained	DAD-IS
Vestlandsk raudkolle	Western red polled cattle	Cattle	2022	354	47	307	Endangered maintained	DAD-IS
Norbrid 1	White Leghorn 1	Chicken	2021	289	38	251	Endangered	DAD-IS
Norbrid 4	White Leghorn 4	Chicken	2021	222	34	188	Endangered	DAD-IS
Norbrid 7	Brown Egg Layer 7	Chicken	2021	266	42	224	Endangered	DAD-IS
Norbrid 8	Brown Egg Layer 8	Chicken	2021	288	43	245	Endangered	DAD-IS
Norsk Jærhøne	Norwegian jaerhon	Chicken	2022	323	52	271	Endangered	DAD-IS
Dunker	Norwegian hound / Dunker	Dog	2022	17		17	Critical	DAD-IS
Haldenstøver	Halden hound	Dog	2022	4		4	Critical	DAD-IS
Hygenhund	Hygen hound	Dog	2022	5		5	Critical	DAD-IS
Lundehund	Norwegian lundehund	Dog	2022	43		43	Critical	DAD-IS
Norsk buhund	Norwegian buhund	Dog	2022	42		42	Critical	DAD-IS
Norsk elghund grå	Norwegian grey elkhound	Dog	2022	176		176	Not at risk	DAD-IS
Norsk elghund sort	Norwegian black elkhound	Dog	2022	71		71	Critical	DAD-IS
Kystgeit	Norwegian coastal goat	Goat	2022	704		704	Endangered	DAD-IS
Norsk melkegeit	Norwegian dairy goat	Goat	2022	35 472		35472	Not at risk	DAD-IS
Norsk hvit gås	Norwegian white goose	Goose	2013	130		130	Critical maintained	DAD-IS
Smaalensgås	Smaalens goose	Goose	2013	180		180	Critical maintained	DAD-IS
Dølahest	Dola horse	Horse	2022	1331	50	1281	Endangered	DAD-IS
Fjordhest	Fjord horse	Horse	2022	1509	38	1471	Endangered	DAD-IS
Nordlandshest lyngshest	Nordland lyngen horse	Horse	2022	893	40	853	Endangered	DAD-IS
Norsk kaldblodstraver	Norwegian coldblooded trotter	Horse	2022	5100		5100	Vulnerable	DAD-IS
Bleset sau	Bleset sheep	Sheep	2022	3320		3320	Endangered maintained	DAD-IS
Dalasau	Dala sheep	Sheep	2022	800		800	Endangered maintained	DAD-IS
Fuglestadbrogete sau	Fuglestadbrogete sheep	Sheep	2022	880		880	Endangered maintained	DAD-IS
Gammelnorsk sau	Old norwegian sheep	Sheep	2022	10 989		10989	Not at risk	DAD-IS
Gammelnorsk spælsau	Old norwegian spel sheep	Sheep	2022	14 828		14828	Not at risk	DAD-IS
Grå trøndersau	Grey tronder sheep	Sheep	2022	1750		1750	Endangered maintained	DAD-IS
Kvit spælsau	White spel sheep	Sheep	2022	37 914		37 914	Not at risk	DAD-IS
Norsk kvit sau	Norwegian white sheep	Sheep	2022	261 404		261 404	Not at risk	DAD-IS
Norsk pelssau	Norwegian fur sheep	Sheep	2022	9261		9261	Not at risk	DAD-IS
Rygja	Rygja sheep	Sheep	2022	2500		2500	Endangered maintained	DAD-IS
Sjeviot	Norwegian Cheviot sheep	Sheep	2022	2748		2748	Endangered maintained	DAD-IS
Steigar	Steigar sheep	Sheep	2022	646		646	Endangered maintained	DAD-IS
Norsk landsvin	Norwegian Landrace pig	Pig	2001	23 050	50	23 000	Not at risk	DAD-IS
Norsk skogkatt	Norwegian forest cat	Cat	2023	239			Undefined	External¹
Norsk huskatt	Norwegian landrace cat	Cat					Undefined	No data
Trønderkanin	Tronder rabbit	Rabbit					Critical*	No data

¹Source: Norwegian Purebred Cat Association (NRR); number of kittens born in Norway in 2023 (katt.nrr.no)
* Source: Norwegian Genetic Resource Center

Supplementary Table F. Swedish national breeds, population size and conservation status.

Breed/Most common name	English/other name	Specie	Year (data)	Population size	Breeding males	Breeding females	Conservation Status	Source
Svensk röd och vit boskap (SRB)	Swedish Red and White cattle	Cattle	2022	217 869	58 852	159 017	Not at risk	DAD-IS
Bohuskulla	Bohuskulla cattle	Cattle	2022	131	38	93	Critical maintained	DAD-IS
Fjällnära boskap	Fjallnara cattle	Cattle	2022	300	54	246	Critical	DAD-IS
Ringamålako	Ringamala cattle	Cattle	2022	111	28	83	Critical	DAD-IS
Rödkulla	Red polled cattle	Cattle	2021	944	270	674	Endangered maintained	DAD-IS
Svensk Fjällras	Swedish mountain cattle	Cattle	2021	7802	2032	5770	Vulnerable	DAD-IS
Svensk Lågland	Swedish lowland cattle	Cattle	2022	5-20	3	10	Critical	DAD-IS
Svensk kullig boskap (skb)	Swedish polled cattle	Cattle	2022	2522	789	1733	Endangered	DAD-IS
Väneko	Vaneko cattle	Cattle	2022	300	30	205	Critical maintained	DAD-IS
Bjurholmshöna	Bjurholms chicken	Chicken	2021	1060	159	871	Endangered	DAD-IS
Bohuslän - Dals svarthöna	Bohuslan - dals black chicken	Chicken	2021	492	115	377	Endangered	DAD-IS
Gotlandshöna	Gotland chicken	Chicken	2021	781	161	620	Endangered	DAD-IS
Hedemorahöna	Hedemora chicken	Chicken	2021	3063	494	2569	Not at risk	DAD-IS
Kindahöna	Kinda chicken	Chicken	2021	1027	216	811	Endangered	DAD-IS
Orusthöna	Orust chicken	Chicken	2021	474	84	390	Endangered	DAD-IS
Skånsk Blommehöna	Scanic blomme chicken	Chicken	2021	957	161	796	Endangered	DAD-IS
Svensk dvärghöna	Swedish dwarf chicken	Chicken					Undefined	No data
Gammalvensk dvärghöna	Old swedish dwarf chicken	Chicken	2021	485	107	378	Endangered	DAD-IS
Åsbohöna	Asbo chicken	Chicken	2021	2139	401	1738	Vulnerable	DAD-IS
Ölandshöns	Oland chicken	Chicken	2021	749	156	593	Endangered	DAD-IS
Öländsk Dvärghöna	Oland dwarf chicken	Chicken	2021	371	75	296	Endangered	DAD-IS
Fiftyfive Flowery	Fiftyfive Flowery	Chicken					Undefined	No data
Blekingeanka	Blekinge duck	Duck	2021	191	76	115	Endangered	DAD-IS
Svensk Blå Anka	Swedish blue duck	Duck	2021	282	92	190	Endangered	DAD-IS
Svensk Gul Anka	Swedish yellow duck	Duck	2021	236	74	162	Endangered	DAD-IS
Svensk Myskanka	Swedish mysk duck	Duck	2021	189	56	133	Endangered	DAD-IS
Göingeget	Goinge goat	Goat	2021	438	79	359	Endangered	DAD-IS
Jämtget	Jamt goat	Goat	2020	533	100	433	Endangered	DAD-IS
Lappget	Lapponian goat	Goat	2020	374	64	310	Endangered	DAD-IS
Svensk Lantras Get	Swedish landrace goat	Goat	2022	1153	35	1118	Endangered maintained	DAD-IS
Skånegås	Scanic goose	Goose	2021	166	62	104	Endangered	DAD-IS
Ölandsgås	Oland goose	Goose	2021	105	42	63	Critical	DAD-IS
Gotlandruss	Gotland pony	Horse	2020	4500-5000	140	2500	Endangered	DAD-IS
Kallblodstravare	Swedish coldblooded trotter	Horse	2022	8000			Not at risk	DAD-IS
Nordsvensk Brukshäst	North swedish horse	Horse	2022	8000-9000		4500	Vulnerable	DAD-IS
Svensk ardennerhäst	Swedish Ardennes	Horse	2018	3000-4000	75	700	Endangered	DAD-IS
Linderödssvin	Linderod pig	Pig	2022	674	165	509	Endangered	DAD-IS
Gotlandskanin	Gotland rabbit	Rabbit	2022	879	339	540	Endangered	DAD-IS
Mellerudskanin	Mellerud rabbit	Rabbit	2022	191	82	109	Endangered	DAD-IS
Pälskanin	Swedish fur rabbit	Rabbit	2007	36	17	19	Undefined	DAD-IS
Dala pälsfår	Dala fur sheep	Sheep	2022	506	57	331	Endangered	DAD-IS
Fjällnäsfår	Fjallnas sheep	Sheep	2022	181	17	124	Critical	DAD-IS
Gestrikefår	Gestrike sheep	Sheep	2022	432	31	283	Critical	DAD-IS
Gotlandsfår	Gotland sheep	Sheep	2022	18 470	1178	17 292	Not at risk	DAD-IS
Gutefår	Gute sheep	Sheep	2022	1850	155	1695	Endangered maintained	DAD-IS
Helsingefår	Helsinge sheep	Sheep	2022	2907	263	1884	Endangered	DAD-IS
Klövsjöfår	Klovsjo sheep	Sheep	2021	1864	171	1162	Endangered maintained	DAD-IS
Roslagsfår	Roslag sheep	Sheep	2022	1182	107	820	Endangered	DAD-IS
Ryafår	Rya sheep	Sheep	2015	1000	68	826	Endangered	DAD-IS
Svenskt finullsfår	Swedish fine wool sheep	Sheep	2020	3493	242	2223	Endangered	DAD-IS
Svärdsjöfår	Svardsjo sheep	Sheep	2020	428	78		Endangered	DAD-IS
Tabacktorpsfår	Tabacktorp sheep	Sheep	2022	98	18	54	Critical	DAD-IS
Värmlandsfår	Varmland sheep	Sheep	2019	3742	601	3141	Vulnerable	DAD-IS
Åsenfår	Asen sheep	Sheep	2022	1171	104	774	Endangered	DAD-IS
Europé	European shorthair	Cat					Undefined	No data
Svensk bondkatt	Swedish landrace cat	Cat					Undefined	No data
Drever	Swedish hound / Drever	Dog	2012	10 010			Endangered	External¹
Gotlandsstövare	Gotland hound	Dog	2012	149			Critical	External¹
Hamiltonstövare	Hamilton hound	Dog	2012	5021			Endangered	External¹
Hälleforshund	Hallefors elkhound	Dog	2012	670			Undefined	External¹
Jämthund	Swedish elkhound /Jamthund	Dog	2012	17 483			Endangered	External¹
Schillerstövare	Schiller hound	Dog	2012	1699			Critical	External¹
Smålandsstövare	Smaland hound	Dog	2012	977			Critical	External¹
Svensk lapphund	Swedish lapponian dog	Dog	2012	1213			Critical	External¹
Svensk vit älghund	Swedish white elkhound	Dog	2012	915			Undefined	External¹
Västgötaspets	Swedish vallhund	Dog	2012	2509			Critical	External¹
Norrbottenspets	Norrbotten spitz	Dog	2012	1626			Critical	External¹

¹ External source: Jansson et al. 2018 https://doi.org/10.1371/journal.pone.0202849

Supplementary Table G. Transboundary Nordic breeds, population size and conservation status.

Breed/Most common name	English/other name	Country	Specie	Year (data)	Population size	Conservation Status	Source
VikingRed	Viking Red	Denmark, Sweden and Finland	Cattle	2017	125 000	Not at risk	External¹
Dansk Svensk Gårdhund	Danish Swedish Farmdog	Denmark	Dog	2023	293-390	Endangered	DAD-IS
Dansk Svensk Gårdshund	Danish Swedish Farmdog	Sweden	Dog	2012	6272	Endangered	External²
Brun Læsøbi	Nordic Brown Bee	Denmark	Honeybee	2022	200	Critical	External³
Den bruna bia	Nordic Brown Bee	Norway	Honeybee	2022	4000	Critical	External³
Tumma mehiläinen (Nordiskt honungsbi)	Nordic Brown Bee	Finland	Honeybee	2022	300	Critical	External³
Nordiskt bi	Nordic Brown Bee	Sweden	Honeybee	2022	2000-3000	Critical	External³
Reinsdyr	Domestic Reindeer	Norway	Reindeer	2022	217 000	Not at risk	Both⁴
Poro (Fennoskandisk ren)	Domestic Reindeer	Finland	Reindeer	2021	195 000	Not at risk	DAD-IS
Tamren	Domestic Reindeer	Sweden	Reindeer	2019	241 000	Not at risk	External⁵

¹NAV – Nordisk Avlsværdi Vurdering (https://nordicebv.info/suomi-nordic-dairy-cattle)

²Jansson et al. 2018 (https://doi.org/10.1371/journal.pone.0202849)

³ NordGen Brown Bee Network (https://www.nordgen.org/en/native-breed/the-nordic-brown-bee/)

⁴ Ressursregnskap for reindriftsnæringen 2023 (https://www.landbruksdirektoratet.no/nb/nyhetsrom/nyhetsarkiv/ressursregnskapet-i-reindriften-for-2022)

⁵Rennäringens tilstånd 2020 (https://www.sametinget.se/158400)