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{{Short description|Archipelago of islets in the Azores, Portugal}}
{{About-distinguish-text|an archipelago in the Azores, Portugal|the similarly-named [[Formigues Islands]] in Girona, Spain}}
{{Infobox islands
| name               = Formigas
| native_name        = Ilhéus das Formigas
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| sobriquet          = Formigas Bank
| image_name         = FormigasFormigao.jpg
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| image_caption      = The lighthouse on Formigão, the largest islet of the Formigas
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| pushpin_map        = Portugal Azores
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| pushpin_relief     = yes
| pushpin_map_caption = Location of the islets in the Azores
| coordinates        = {{coord|37|16|00|N|24|46|00|W|display=it}}<ref name="ramsar1">{{Cite web|title=Ilhéus das Formigas e Recife Dollabarat|website=[[Ramsar Convention|Ramsar]] Sites Information Service|url=https://rsis.ramsar.org/ris/1804|date=16 June 2008 |accessdate=25 April 2018}}</ref>
| etymology          = ''Formigas'', [[Portuguese language|Portuguese]] plural for ''[[ants]]''
| location           = [[Atlantic Ocean]]
| grid_reference     = <!-- UK only -->
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| area_km2           = 0.009
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| country            = [[Portugal]]
| country_admin_divisions_title = Autonomous region
| country_admin_divisions = [[Azores]]
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| population         = Uninhabited
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| website            = https://siaram.azores.gov.pt/vulcanismo/banco-formigas/_intro.html
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}}
'''Formigas Islets''' ({{langx|pt|Ilhéus das Formigas}} {{IPA|pt|fuɾˈmiɣɐʃ|}}; {{lit|Islets of the Ants}}), sometimes referred to as the '''Formigas Bank''', are a group of uninhabited rocky outcroppings in the eastern group of the [[Azores]] [[archipelago]], an autonomous region of [[Portugal]]. The bank is located {{convert|43|km|mi}} northeast of [[Santa Maria Island (Azores)|Santa Maria]] and southeast of [[São Miguel Island|São Miguel]], covering a surface area of approximately {{convert|9000|m2|ft2}}. The submerged [[Dollabarat]] Reef is in the same area. The only structure on the islets is a [[lighthouse]] located on '''Formigão''' (''Big Ant''), the largest [[islet]].

==History==
[[File:Formigas 1849 map.png|left|thumb|upright=2|200px|Map of 1849]]
The Formigas were discovered by Portuguese explorers [[Diogo de Silves]] and [[Gonçalo Velho Cabral]] in 1431 during their journey to [[Madeira]]. The islets were neglected due to the contemporaneous discovery of the neighboring inhabitable islands of Santa Maria and São Miguel. In the 16th century, Portuguese chronicler [[Gaspar Frutuoso]] reported on the Formigas' rich marine life.

The Formigas served as both an aid and hindrance to navigation from their discovery well into the 20th century. On 8 April 1832, the British ship ''[[List_of_shipwrecks_in_April_1832#8_April|Zyllah]]'' wrecked on a subsurface rock at the Formigas and its crew had to be rescued the next day by the British merchantman ''[[Morley (1811 ship)|Morley]]''.<ref name="Times14837">{{Cite newspaper The Times |title=Ship News |date=27 April 1832 |page=1 |issue=14837|column=F }}</ref> Nearly ninety years later on 16 June 1921, the [[Greece|Greek]] cargo ship ''[[List_of_shipwrecks_in_1921#June|Olympia]]'' ran aground and wrecked at Formigas; the crew survived.<ref name="Times42751">{{Cite newspaper The Times |title=Casualty reports |date=20 June 1921 |page=17 |issue=42751 |column=E }}</ref>

The islets have long garnered scientific and commercial interest. In 1886, the [[Italy|Italian]] ship ''Corsaro'' visited the Formigas Islets, dredging the area for the first time for scientific research purposes. [[Albert I, Prince of Monaco|Prince Albert I of Monaco's]] ''Princess Alice'' expedition also visited the islets in 1895 to investigate the marine life, for both scientific and commercial fishery purposes.

Since 4 April 1988, the Formigas Bank has the status of Nature Reserve and is protected by a decree of the [[Legislative Assembly of the Azores]] (Regional Legislative Decree Nº11/88/A). It is also considered a European Site of Community Importance (Rede Natura 2000). The habitats protected by the Azorean decree include the area from the emerged islets to depths of more than {{convert|1700|m|ft}}, yet this has not stopped incidents of commercial fishing. Consequently, the area is regularly patrolled by a Portuguese naval vessel based in [[Ponta Delgada]].

Since 16 June 2008, the Formigas Islets and neighboring Dollabarat Reef have been recognized as a [[Ramsar Convention]] [[wetland]] under the name ''Ilhéus das Formigas e Recife Dollabarat''.<ref name="ramsar1"/>

===Formigas Lighthouse===
The '''Formigas Lighthouse''' ({{langx|pt|[[:pt:Farol das Formigas|Farol das Formigas]]}}) is located on Formigão, the largest islet of the Formigas. The current beacon is a {{convert|19|m|ft|adj=on}} stone tower painted white. As the base of the tower is at an elevation of about {{convert|3|m|ft}} above sea level, the beacon is at {{convert|22|m|ft}} above sea level. The lighthouse's signal is visible from {{convert|12|nmi|km}} away on clear days, although there have been reports of seeing it from the southeastern part of São Miguel and the northeastern part of Santa Maria. In rough seas, waves completely immerse the tower.

As early as 1883 the Portuguese government formally recognized the dangers posed by the Formigas to navigation and proposed building a lighthouse on the islets, but nothing was constructed at the time. On 2 March 1895, at the General Meeting of the [[Ponta Delgada (district)|Autonomous District of Ponta Delgada]], the District initiated construction of lighthouses on São Miguel and Santa Maria. Because of this, and also due to the technical difficulties of building a lighthouse in that era in a place so inhospitable as the Formigas, construction of a lighthouse on the islets themselves was further delayed.

Finally, in the summer of 1948 the Portuguese government began a complex operation to build a lighthouse on Formigão. In order to land personnel and equipment on the islet, the workers first had to break away subsurface rocks and build a [[wharf]]. Despite various interruptions to the work due to rough seas and inclement weather, in 36 days the workers managed to build a small beacon. In 1962, the [[Portuguese Navy]]'s [[lightvessel|lightship]] ''[[:pt:NRP Almirante Schultz|NRP Almirante Schultz]]'' anchored at the Formigas and was used as a work base for renovating and modernizing the lighthouse. In the succeeding years the lighthouse was further modernized; the beacon now runs on [[solar power]] and its old [[acetylene]] lamp has been replaced with a newer model.

==Geography==
[[File:FormigasBank.jpg|left|200px|thumb|Dispersed rocks in the northern part of the Formigas.]]
The islets are composed of [[basalt]] flows that occurred approximately 4 million years ago, although calcareous fossiliferous sediments dating to 4-6 million years ago have been discovered. The bank extends for {{convert|13|km|mi}} from northwest to southeast and is {{convert|5.5|km|mi}} wide. Due to strong currents and frequent large swells, the linear rock outcroppings lack any terrestrial flora or fauna. Along the archipelago's perimeter, the seabed drops steeply to a depth of {{convert|50|-|70|m|ft}} on either side, and gently at the northern and southern tips. The area of the bank referred to as the [[Dollabarat]] Reef is an area of shallower gradient, situated {{convert|5|km|mi}} along the southwest of the Formigas Islets.

''Formigas'' is Portuguese for ants, as the small and dispersed rocks resemble scattered ants. The largest islet Formigão has a maximum altitude of {{convert|11|m|ft}} above sea level. Generally the islets are useful for navigation and visible up to {{convert|19|km|mi}} away on clear days, but during inclement weather a ship can run aground on the rocks without even seeing the lighthouse.

===Biome===
The Formigas Bank is essentially a [[submarine volcano]] inhabited by deep-dwelling marine species such as coral and sponges.<ref name="ramsar1"/><ref name="SIARAM">SIARAM (September 2010)</ref> The volcanic cone is delimited approximately by the Formigas islets of the northwest and Dollabarat Reef to the southeast.<ref name=SIARAM/> In the ancient crater there is a rich community of species common to the Azores. Among the species typical of the area are [[wrasse]] ([[Mediterranean rainbow wrasse]] and [[Thalassoma pavo|ornate wrasse]]<ref name="ramsar1"/>), [[damselfish]], [[Sergeant major (fish)|sergeant fish]] (yellow and black), [[grouper]], [[Mediterranean parrotfish]], and the emblematic [[Atlantic goliath grouper]], [[serranidae]] and [[barred hogfish]].<ref name=SIARAM/> Alongside these are [[African threadfish]] and [[longbill spearfish]], pelagic predators that also reside in the bank, and migratory species like [[manta ray]] and [[whale shark]].<ref name=SIARAM/>

The base and surface of the volcano is covered in various types of [[black coral]], [[Corynactis|soft corals]], [[sponge]]s, and other invertebrates, as well as various [[algae]], forming a mosaic of micro-habitats.<ref name=SIARAM/> The geological differences of the Formigas Islets and Dollabarat Reef relative to the rest of the Azores are accentuated by the types of flora present there. The Formigas and Dollabarat both have an elevated biomass of [[brown algae]] considered unique to the Azores; the fields of [[kelp]] are situated between {{convert|45|m|ft}} and {{convert|60|m|ft}} below the crater at the Formigas, while at Dollabarat the [[Cystoseira|brown algae]] is located along the reef's flanks.<ref name=SIARAM/>

[[File:Formigas Islets - no watermark.jpg|center|700px|thumb|Photograph of the Formigas Islets (2010).]]

==References==
;Notes
{{Reflist|2}}
;Sources
* {{cite book|first=Manuel Maria Sarmento|last=Rodrigues|title=Ancoradouros das Ilhas dos Açores|trans-title=Anchorages on the Islands of the Azores|publisher=Instituto Hidrográfico|location=Lisbon, Portugal|year=1970|edition=3|pages=255|language=Portuguese}}
* {{citation |first=Alexander |last=Vidal |contribution=The Formigas Bank, near Santa Maria (Azores) |title=Journal of the Royal Geographical Society of London |publisher=Royal Geographical Society |location=London, England |volume=19 |year=1849 |pages=160–166}}
* {{citation|first=Sérgio P.|last=Ávila|first2=José M.N.|last2=Azevedo|title=Shallow-water Mollusks from the Formigas Islets, Azores, collected during the ''Santa Maria e Formigas 1990'' Scientific Expedition|publisher=Açoreana|year=1997|pages=323–330}}
* {{citation|first=Sabine|last=Christiansen|first2=Fernadno|last2=Tempera|title=The Formigas Bank - A Potential MPA|publisher=WWF World Wildlife Fund|location=Washington, D.C., United States}}
* {{citation |first=Pedro |last=Afonso |editor=SRAM |publisher=Secretária Regional do Ambiente e do Mar |location=Horta (Azores), Portugal |language=Portuguese |accessdate=6 October 2012 |date=September 2010 |title=Banco das Formigas |url=https://siaram.azores.gov.pt/vulcanismo/banco-formigas/Vulcanismo-Banco-das-Formigas.pdf}}

{{Azores Islands}}

[[Category:Islets of the Azores]]
[[Category:Ramsar sites in Portugal]]
[[Category:Uninhabited islands of Portugal]]
[[Category:Archipelagoes of Portugal]]