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A decoy (derived from the Dutch de kooi, literally "the cage"^[1] or possibly ende kooi, "duck cage"^[2]) is usually a person, device, or event which resembles what an individual or a group might be looking for, but it is only meant to lure them. Decoys have been used for centuries most notably in game hunting, but also in wartime and in the committing or resolving of crimes.

Hunting

In hunting wildfowl, the term decoy may refer to two distinct devices. One, the duck decoy (structure), is a long cone-shaped wickerwork tunnel installed on a small pond to catch wild ducks. After the ducks settled on the pond, a small, trained dog would herd the birds into the tunnel. The catch was formerly sent to market for food, but now these are used only by ornithologists to catch ducks to be ringed and released. The word decoy, also originally found in English as "coy", derives from the Dutch de Kooi (the cage) and dates back to the early 17th century, when this type of duck trap was introduced to England from the Netherlands. As "decoy" came more commonly to signify a person or a device than a pond with a cage-trap, the latter acquired the retronym decoy pool.^[3]

The other form, a duck decoy (model), otherwise known as a 'decoy duck', 'hunting decoy' or 'wildfowl decoy', is a life-size model of the creature. The hunter places a number about the hunting area as they will encourage wild birds to land nearby, hopefully within the range of the concealed hunter. Originally carved from wood, they are now typically made from plastic.^[4]

Wildfowl decoys (primarily ducks, geese, shorebirds, and crows, but including some other species) are considered a form of folk art. Collecting decoys has become a significant hobby both for folk art collectors and hunters. The world record was set in September 2007 when a pintail drake and Canada goose, both by A. Elmer Crowell, sold for 1.13 million dollars apiece.^[5]^[6]

Military decoy

An inflatable dummy tank modeled after an M4 Sherman

The decoy in war is a low-cost device intended to represent a real item of military equipment.

They may be used in different ways:

deployed in amongst their real counterparts, to divert part of the enemy fire away from the real items of equipment.
for military deception, fooling the enemy into believing forces in a particular area are much stronger than they really are. One notable example are Quaker Guns.
to produce a multitude of false signals to overwhelm a radar or sonar defence system, such as flares for IR-guided missiles or chaff for ICBMs.

Bomb decoy

In irregular warfare, improvised explosive devices (IEDs) are commonly used as roadside bombs to target military patrols. Some guerrillas also use imitation IEDs to intimidate civilians,^[7] to waste bomb disposal resources,^[8] or to set up an ambush.^[9]^[10]^[11] Some terrorist groups use fake bombs during a hostage siege, in order to limit hostage rescue efforts.^[12]^[13]^[14]

Sonar decoy

A sonar decoy is a device designed to create a misleading reading on sonar, such as the appearance of a false target.

In biochemistry

In biochemistry, there are decoy receptors, decoy substrates and decoy RNA. In addition, digital decoys are used in protein folding simulations.

Decoy receptor

Decoy receptors, or sink receptors,^[15] are receptors that bind a ligand, inhibiting it from binding to its normal receptor. For instance, the receptor VEGFR-1 can prevent vascular endothelial growth factor (VEGF) from binding to the VEGFR-2^[15] The TNF inhibitor etanercept exerts its anti-inflammatory effect by being a decoy receptor that binds to TNF.^[16]

Decoy substrate

A decoy substrate or pseudosubstrate is a protein that has similar structure to the substrate of an enzyme, in order to make the enzyme bind to the pseudosubstrate rather than to the real substrate, thus blocking the activity of the enzyme. These proteins are therefore enzyme inhibitors.

Examples include K3L produced by vaccinia virus, which prevents the immune system from phosphorylating the substrate eIF-2 by having a similar structure to eIF-2. Thus, the vaccinia virus avoids the immune system.

Digital decoys

In protein folding simulations, a decoy is a computer-generated protein structure which is designed so to compete with the real structure of the protein. Decoys are used to test the validity of a protein model; the model is considered correct only if it is able to identify the native state configuration of the protein among the decoys.

Decoys are generally used to overcome a main problem in protein folding simulations: the size of the conformational space. For very detailed protein models, it can be practically impossible to explore all the possible configurations to find the native state. To deal with this problem, one can make use of decoys. The idea behind this is that it is unnecessary to search blindly through all possible conformations for the native conformation; the search can be limited to a relevant sub-set of structures. To start with, all non-compact configurations can be excluded. A typical decoy set will include globular conformations of various shapes, some having no secondary structures, some having helices and sheets in different proportions. The computer model being tested will be used to calculate the free energy of the protein in the decoy configurations. The minimum requirement for the model to be correct is that it identifies the native state as the minimum free energy state (see Anfinsen's dogma).

References

^ Cresswell, Julia (2021). Oxford Dictionary of Word Origins. Oxford University Press. ISBN 978-0192639370.
^ Wedgwood, Hensleigh (1855). "On False Etymologies". Transactions of the Philological Society (6): 71.
^ Janet (1993). "Duck decoys, with particular reference to the history of bird ringing". Archives of Natural History. 20 (2): 229–240. doi:10.3366/anh.1993.20.2.229. ISSN 0260-9541.
^ Mackey, William J. (1987). American bird decoys. New York: Dutton. ISBN 978-0-525-24500-1.
^ Frangoulis, George (2014). Ducks and Decoys. tuscaloosa, Alabama: The Farmstead Press. ISBN 978-1-312-60897-9.
^ "To tune of $1.13m, decoys are the real thing". The Boston Globe. 2007-09-21. Retrieved 2007-09-21.
^ "Four decoy IEDs found in Port Said polling stations - Egypt Independent". 25 May 2014.
^ Article title Archived 2022-09-30 at the Wayback Machine ^{[bare URL PDF]}
^ "In Battle, Hunches Prove to Be Valuable". The New York Times. 28 July 2009.
^ ""One enemy TTP is to set decoy IEDs in order to observe the immediate reactions of coalition forces. By studying our tactics they can increase the lethality of their attacks, like setting up mortars and rockets on the kill zone or safe area." (PDF)" (PDF). Archived from the original (PDF) on February 21, 2016. Retrieved Apr 12, 2019.
^ James H. Lebovic (2010). The Limits of U.S. Military Capability: Lessons from Vietnam and Iraq. JHU Press. p. 62. ISBN 978-0-8018-9750-4.
^ Bonnie Malkin in Sydney (6 September 2011). "Video: Man takes female hostage in Sydney office bomb siege - Telegraph". Telegraph.co.uk. Archived from the original on 6 September 2011.
^ "We're for Sydney". Daily Telegraph. Retrieved 2019-04-12.
^ "How Sydney siege gunman tricked police into thinking there was a bomb in his backpack". The Sydney Morning Herald. 17 December 2014.
^ ^a ^b Hugo H. Marti (2013). Vascular Endothelial Growth Factor. Landes Bioscience.
^ Zalevsky J, Secher T, Ezhevsky SA, et al. (August 2007). "Dominant-negative inhibitors of soluble TNF attenuate experimental arthritis without suppressing innate immunity to infection". J. Immunol. 179 (3): 1872–83. doi:10.4049/jimmunol.179.3.1872. PMID 17641054.

External links

Decoy Magazine, Joe Engers - The ultimate publication for decoy lovers and collectors
The Midwest Decoy Collectors Association – The de facto international collectors association
The Book of Duck Decoys – Sir Ralph Payne-Gallwey, 1886 (full text)
British Duck Decoys of To-Day, 1918 – Joseph Whitaker (full text)

[1] Cresswell, Julia (2021). Oxford Dictionary of Word Origins. Oxford University Press. ISBN 978-0192639370.

[2] Wedgwood, Hensleigh (1855). "On False Etymologies". Transactions of the Philological Society (6): 71.

[3] Janet (1993). "Duck decoys, with particular reference to the history of bird ringing". Archives of Natural History. 20 (2): 229–240. doi:10.3366/anh.1993.20.2.229. ISSN 0260-9541.

[4] Mackey, William J. (1987). American bird decoys. New York: Dutton. ISBN 978-0-525-24500-1.

[5] Frangoulis, George (2014). Ducks and Decoys. tuscaloosa, Alabama: The Farmstead Press. ISBN 978-1-312-60897-9.

[6] "To tune of $1.13m, decoys are the real thing". The Boston Globe. 2007-09-21. Retrieved 2007-09-21.

[7] "Four decoy IEDs found in Port Said polling stations - Egypt Independent". 25 May 2014.

[8] Article title Archived 2022-09-30 at the Wayback Machine ^{[bare URL PDF]}

[9] "In Battle, Hunches Prove to Be Valuable". The New York Times. 28 July 2009.

[10] ""One enemy TTP is to set decoy IEDs in order to observe the immediate reactions of coalition forces. By studying our tactics they can increase the lethality of their attacks, like setting up mortars and rockets on the kill zone or safe area." (PDF)" (PDF). Archived from the original (PDF) on February 21, 2016. Retrieved Apr 12, 2019.

[Lebovic2010-11] James H. Lebovic (2010). The Limits of U.S. Military Capability: Lessons from Vietnam and Iraq. JHU Press. p. 62. ISBN 978-0-8018-9750-4.

[12] Bonnie Malkin in Sydney (6 September 2011). "Video: Man takes female hostage in Sydney office bomb siege - Telegraph". Telegraph.co.uk. Archived from the original on 6 September 2011.

[13] "We're for Sydney". Daily Telegraph. Retrieved 2019-04-12.

[14] "How Sydney siege gunman tricked police into thinking there was a bomb in his backpack". The Sydney Morning Herald. 17 December 2014.

[vegf-15] Hugo H. Marti (2013). Vascular Endothelial Growth Factor. Landes Bioscience.

[16] Zalevsky J, Secher T, Ezhevsky SA, et al. (August 2007). "Dominant-negative inhibitors of soluble TNF attenuate experimental arthritis without suppressing innate immunity to infection". J. Immunol. 179 (3): 1872–83. doi:10.4049/jimmunol.179.3.1872. PMID 17641054.

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+{{Short description|Person, device, or event designed as a distraction}}
-:''See [[Decoy (TV series)]] for the 1957 television series of this name.''
+{{Other uses}}
+{{Multiple issues|
+{{Globalize|date=December 2010}}
+{{More citations needed|date=August 2022}}
+}}
+[[Image:Decoys.jpg|thumb|Carved wooden [[duck decoy (model)|duck decoys]]]]
-A '''decoy''' is usually a person, [[device]] or event meant as a distraction to conceal what an individual or a group might be looking for. Decoys have been used for centuries most notably in game [[hunting]], but also in [[war]]time and in the committing or resolving of [[crime]]s.
+A '''decoy''' (derived from the Dutch ''de'' ''kooi'', literally "the cage"<ref>{{Cite book|last=Cresswell|first=Julia|title=Oxford Dictionary of Word Origins|publisher=Oxford University Press|year=2021|isbn=978-0192639370}}</ref> or possibly ''ende kooi'', "[[Duck decoy (structure)|duck cage]]"<ref>{{cite journal|last=Wedgwood|first=Hensleigh|author-link=Hensleigh Wedgwood|title=On False Etymologies|journal=Transactions of the Philological Society|url=https://babel.hathitrust.org/cgi/pt?id=uc1.b3924121;view=1up;seq=81|year=1855|issue=6|page=71}}</ref>) is usually a person, [[tool|device]], or event which resembles what an individual or a group might be looking for, but it is only meant to lure them. Decoys have been used for centuries most notably in game [[hunting]], but also in [[war]]time and in the committing or resolving of [[crime]]s.
+[[Image:Decoy in action.png|thumb|Illustration demonstrating the use of a dog in a [[duck decoy (structure)|duck decoy]] tunnel (1886)]]
-The decoy in war may ''for example'' be a wooden fake [[tank]], designed to be mistaken by [[bomber]] plane crews to be real, or a device that fools an automatic system such as a [[guided missile]], by simulating some physical properties of a real target.
+== Hunting ==
-For a [[defense (military)|defence]] system, decoys and [[Chaff (radar countermeasure)|chaff]] for [[ICBM]]s are released from the rocket in midcourse after reentry. If released before reentry the decoys and chaff would burn up in [[Earth's atmosphere|atmosphere]].
+In hunting wildfowl, the term decoy may refer to two distinct devices. One, the [[duck decoy (structure)]], is a long cone-shaped [[wickerwork]] tunnel installed on a small pond to catch wild [[duck]]s. After the ducks settled on the pond, a small, trained dog would herd the birds into the tunnel. The catch was formerly sent to market for food, but now these are used only by [[ornithologist]]s to catch ducks to be [[Bird ringing|ring]]ed and released. The word ''decoy'', also originally found in English as "coy", derives from the [[Dutch language|Dutch]] ''de Kooi'' (the cage) and dates back to the early 17th century, when this type of duck trap was introduced to England from the Netherlands. As "decoy" came more commonly to signify a person or a device than a pond with a cage-trap, the latter acquired the [[retronym]] decoy pool.<ref>{{Cite journal |last=Janet |date=1993|title=Duck decoys, with particular reference to the history of bird ringing |url=https://www.euppublishing.com/doi/10.3366/anh.1993.20.2.229 |journal=Archives of Natural History |language=en |volume=20 |issue=2 |pages=229–240 |doi=10.3366/anh.1993.20.2.229 |issn=0260-9541}}</ref>
+The other form, a [[duck decoy (model)]], otherwise known as a 'decoy duck', 'hunting decoy' or 'wildfowl decoy', is a life-size model of the creature. The hunter places a number about the hunting area as they will encourage wild birds to land nearby, hopefully within the range of the concealed hunter. Originally carved from wood, they are now typically made from plastic.<ref>{{Cite book |last=Mackey |first=William J. |title=American bird decoys |date=1987 |publisher=Dutton |isbn=978-0-525-24500-1 |location=New York}}</ref>
-A '''decoy''' was originally a small pond with a long cone-shaped [[wickerwork]] tunnel, used to catch wild [[duck]]s. After the ducks settled, a small trained dog would herd the ducks into the tunnel. The catch was formerly sent to market for food, but now these are only used to catch ducks to be [[ring (identification)|ring]]ed and released: see [[ornithology]]. The word came from [[Dutch language|Dutch]] ''eende kooi'' = "duck cage". As the above meaning of a person or device supplanted the original meaning as the most common, the latter acquired the [[retronym]] "decoy pool".
+Wildfowl decoys (primarily ducks, geese, shorebirds, and crows, but including some other species) are considered a form of [[folk art]]. [[Waterfowl decoy collecting|Collecting decoys]] has become a significant hobby both for folk art collectors and hunters. The world record was set in September 2007 when a pintail drake and Canada goose, both by [[A. Elmer Crowell]], sold for 1.13 million dollars apiece.<ref>{{Cite book|title=Ducks and Decoys|last=Frangoulis|first=George|publisher=The Farmstead Press|year=2014|isbn=978-1-312-60897-9|location=tuscaloosa, Alabama}}</ref><ref>{{cite news|url=http://www.boston.com/news/globe/living/articles/2007/09/21/to_tune_of_113m_decoys_are_the_real_thing/|title=To tune of $1.13m, decoys are the real thing|access-date=2007-09-21 | work=The Boston Globe | date=2007-09-21}}</ref>
-Duck decoy carving is considered a form of [[folk art]]. Collecting and selling decoys have become a lucrative industry. The world record was set in January of 2003 when a preening [[pintail]] drake (circa 1915) by [[A. Elmer Crowell]] of [[Harwell, MA]] sold for $801,500(US).
-==See also==
+==Military decoy==
+[[Image:DummyShermanTank.jpg|thumb|An inflatable [[dummy tank]] modeled after an [[M4 Sherman]]]]
-*[[Boarstall Duck Decoy]]
+{{Main|Military dummy}}
-*[[Mobile submarine simulator]]
+The decoy in war is a low-cost device intended to represent a real item of military equipment.
-*[[Sting operation]]
-*[[Decoy effect]]
+They may be used in different ways:
-*[[Honeypot (computing)|Honeypots]]--decoy resources for computer [[network security]].
+* deployed in amongst their real counterparts, to divert part of the enemy fire away from the real items of equipment.
+* for [[military deception]], fooling the enemy into believing forces in a particular area are much stronger than they really are. One notable example are [[Quaker Gun]]s.
+* to produce a multitude of false signals to overwhelm a radar or sonar defence system, such as [[Flare (countermeasure)|flare]]s for [[Infrared homing|IR-guided missiles]] or [[Chaff (countermeasure)|chaff]] for [[Intercontinental ballistic missile|ICBM]]s.
+===Bomb decoy===
+In [[irregular warfare]], [[improvised explosive device]]s (IEDs) are commonly used as roadside bombs to target military patrols. Some [[Guerrilla warfare|guerrillas]] also use imitation IEDs to intimidate civilians,<ref>{{cite web|url=http://www.egyptindependent.com/news/four-decoy-ieds-found-port-said-polling-stations|title=Four decoy IEDs found in Port Said polling stations - Egypt Independent|date=25 May 2014 }}</ref> to waste [[bomb disposal]] resources,<ref>[http://apps.dtic.mil/dtic/tr/fulltext/u2/a528332.pdf Article title] {{Webarchive|url=https://web.archive.org/web/20220930073333/https://apps.dtic.mil/dtic/tr/fulltext/u2/a528332.pdf |date=2022-09-30 }} {{Bare URL PDF|date=March 2022}}</ref> or to set up an ambush.<ref>{{cite news|url=https://www.nytimes.com/2009/07/28/health/research/28brain.html|title=In Battle, Hunches Prove to Be Valuable|date=28 July 2009|work=The New York Times}}</ref><ref>{{cite web|url=http://www.usmcofficer.com/wp-content/uploads/2014/02/Improvised-Explosive-Devices.pdf|title="One enemy TTP is to set decoy IEDs in order to observe the immediate reactions of coalition forces. By studying our tactics they can increase the lethality of their attacks, like setting up mortars and rockets on the kill zone or safe area." (PDF)|access-date=Apr 12, 2019|archive-date=February 21, 2016|archive-url=https://web.archive.org/web/20160221231728/http://www.usmcofficer.com/wp-content/uploads/2014/02/Improvised-Explosive-Devices.pdf|url-status=dead}}</ref><ref name="Lebovic2010">{{cite book|author=James H. Lebovic|title=The Limits of U.S. Military Capability: Lessons from Vietnam and Iraq|url=https://books.google.com/books?id=-dbYsfiKV8UC|year= 2010|publisher=JHU Press|isbn=978-0-8018-9750-4|page=62}}</ref> Some terrorist groups use fake bombs during a [[hostage]] siege, in order to limit hostage rescue efforts.<ref>{{cite web|url=https://www.telegraph.co.uk/news/newsvideo/8743685/Man-takes-female-hostage-in-Sydney-office-bomb-siege.html|archive-url=https://web.archive.org/web/20110906122037/http://www.telegraph.co.uk/news/newsvideo/8743685/Man-takes-female-hostage-in-Sydney-office-bomb-siege.html|url-status=dead|archive-date=6 September 2011|title=Video: Man takes female hostage in Sydney office bomb siege - Telegraph|author=Bonnie Malkin in Sydney|date=6 September 2011|work=Telegraph.co.uk}}</ref><ref>{{cite web|url=http://www.dailytelegraph.com.au/news/nsw/police-defend-waiting-11-hours-to-storm-parramatta-building-after-man-with-12-year-old-girl-said-he-had-bom/story-e6freuzi-1226130987671 |title=We're for Sydney |publisher=Daily Telegraph |access-date=2019-04-12}}</ref><ref>{{cite web|url=http://www.smh.com.au/nsw/how-sydney-siege-gunman-tricked-police-into-thinking-there-was-a-bomb-in-his-backpack-20141217-129fqi.html|title=How Sydney siege gunman tricked police into thinking there was a bomb in his backpack|work=The Sydney Morning Herald|date=17 December 2014 }}</ref>
+=== Sonar decoy ===
+{{Main article|Sonar decoy}}
+A sonar decoy is a device designed to create a misleading reading on [[sonar]], such as the appearance of a false target.
+==In biochemistry==
+In biochemistry, there are decoy [[receptor (biochemistry)|receptors]], decoy [[Substrate (biochemistry)|substrates]] and decoy [[ribonucleic acid|RNA]]. In addition, digital decoys are used in [[protein folding]] simulations.
+===Decoy receptor=== <!--Decoy receptor redirects here-->
+[[Decoy receptors]], or sink receptors,<ref name=vegf>{{cite book|url=https://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=eurekah.section.2469|title=Vascular Endothelial Growth Factor|author=Hugo H. Marti|year=2013 |publisher=Landes Bioscience }}</ref> are receptors that bind a [[ligand]], inhibiting it from binding to its normal receptor. For instance, the receptor [[VEGFR-1]] can prevent [[vascular endothelial growth factor]] (VEGF) from binding to the [[VEGFR-2]]<ref name=vegf/> The [[TNF inhibitor]] [[etanercept]] exerts its anti-inflammatory effect by being a decoy receptor that binds to TNF.<ref>{{cite journal |vauthors=Zalevsky J, Secher T, Ezhevsky SA |title=Dominant-negative inhibitors of soluble TNF attenuate experimental arthritis without suppressing innate immunity to infection |journal=J. Immunol. |volume=179 |issue=3 |pages=1872–83 |date=August 2007 |pmid=17641054 |doi= 10.4049/jimmunol.179.3.1872|display-authors=etal|doi-access=free }}</ref>
+===Decoy substrate=== <!--Pseudosubstrate redirects here-->
+A ''decoy substrate'' or ''pseudosubstrate'' is a protein that has similar structure to the [[Substrate (biochemistry)|substrate]] of an [[enzyme]], in order to make the enzyme bind to the pseudosubstrate rather than to the real substrate, thus blocking the activity of the enzyme. These proteins are therefore [[enzyme inhibitor]]s.
+Examples include [[Vaccinia#Host resistance|K3L]] produced by [[vaccinia virus]], which prevents the [[immune system]] from phosphorylating the substrate [[eIF-2]] by having a similar structure to eIF-2. Thus, the vaccinia virus avoids the immune system.
+===Digital decoys===
+In protein folding simulations, a decoy is a computer-generated protein structure which is designed so to ''compete'' with the real structure of the protein. Decoys are used to test the validity of a protein model; the model is considered correct only if it is able to identify the native state configuration of the protein among the decoys.
+Decoys are generally used to overcome a main problem in protein folding simulations: the size of the [[Polymer chemistry|conformational space]]. For very detailed protein models, it can be practically impossible to explore all the possible configurations to find the native state.
+To deal with this problem, one can make use of decoys. The idea behind this is that it is unnecessary to search blindly through all possible conformations for the native conformation; the search can be limited to a relevant sub-set of structures. To start with, all non-compact configurations can be excluded.
+A typical decoy set will include globular conformations of various shapes, some having no secondary structures, some having helices and sheets in different proportions.
+The computer model being tested will be used to calculate the [[Thermodynamic free energy|free energy]] of the protein in the decoy configurations. The minimum requirement for the model to be correct is that it identifies the native state as the minimum free energy state (see [[Anfinsen's dogma]]).
+== See also ==
+* {{annotated link|Boarstall Duck Decoy}}
+* {{annotated link|Decoy effect}}
+* {{annotated link|Game call}}
+* {{annotated link|Hale Duck Decoy}}
+* {{annotated link|Honeypot (computing)|Honeypots}}
+* {{annotated link|Russian military deception|Maskirovka}}
+* {{annotated link|Mobile submarine simulator}}
+* {{annotated link|Penetration aid}}
+* {{annotated link|Red herring}}
+* {{annotated link|Sting operation}}
+* {{annotated link|XGAM-71 Buck Duck}}
+* [[Garden owl]] - Pest control decoy
+==References==
+{{Reflist}}
 ==External links==
+{{Commons category|Decoys}}
-*[http://www.decoymans.co.uk/pages/title.html The Book of Duck Decoys] - Sir Ralph Payne Gallwey, 1886 (full text)
+* [http://www.decoymag.com/ Decoy Magazine, Joe Engers] - The ultimate publication for decoy lovers and collectors
-*[http://www.decoymans.freeserve.co.uk/british.htm British Duck Decoys of To-Day, 1918] - Joseph Whitaker (full text)
-*[http://www.decoymag.com Decoy Magazine] - Premier Place for Collecting Antique Duck Decoys
+* [http://www.midwestdecoy.org/ The Midwest Decoy Collectors Association] – The de facto international collectors association
+* [https://web.archive.org/web/20080405052419/http://www.decoymans.co.uk/chapter1/page17.html The Book of Duck Decoys] – [[Ralph Payne-Gallwey|Sir Ralph Payne-Gallwey]], 1886 (full text)
-*[http://www.wardmuseum.org Ward Museum of Wildfowl Art] - [[Salisbury, MD]].
+* [https://web.archive.org/web/20041209144620/http://www.decoymans.freeserve.co.uk/british.htm British Duck Decoys of To-Day, 1918] – Joseph Whitaker (full text)
-*[http://www.decoymuseum.com Havre de Grace Decoy Musuem] - Duck Decoy Museum. [[Havre de Grace, MD]].
+{{Authority control}}
-[[Category:Hunting]]
-[[sv:Bulvan]]
+[[Category:Decoys| ]]
+[[Category:Hunting equipment]]
+[[Category:Penetration aids]]