Burrow

Vertebrate burrows

A large variety of vertebrates construct or use burrows in many types of substrate; burrows can range widely in complexity. Some examples of vertebrate burrowing animals include a number of mammals, amphibians, fish (dragonet and lungfish), reptiles, and birds (including small dinosaurs). Mammals are perhaps most well known for burrowing. Mammal species such as Insectivora like the mole, and rodents like the gopher, great gerbil and groundhog are often found to form burrows. Some other mammals that are known to burrow are the platypus, pangolin, pygmy rabbit, armadillo, rat and weasel. Some rabbits, members of the family Leporidae, are well-known burrowers. Some species, such as the groundhog, can construct burrows that occupy a full cubic metre, displacing about 300 kg of dirt. There is evidence that rodents may construct the most complex burrows of all vertebrate burrowing species. For example, great gerbils live in family groups in extensive burrows, which can be seen on satellite images. Even the unoccupied burrows can remain visible in the landscape for years. The burrows are distributed regularly, although the occupied burrows appear to be clustered in space. Even Carnivora like the meerkat, and marsupials, such as wombats are burrowers. Wombat burrows are large and some have been mapped using a drone. The largest burrowing animal is probably the polar bear when it makes its maternity den in snow or earth. Lizards are also known to construct and live in burrows, and may exhibit territorial behaviour over the burrows as well. There is also evidence that a burrow provides protection for the Adelaide pygmy blue-tongue skink (Tiliqua adelaidensis) when fighting, as they may fight from inside their burrows.

Burrows by birds are usually made in soft soils; some penguins and other pelagic seabirds are noted for such burrows. The Magellanic penguin is an example, constructing burrows along coastal Patagonian regions of Chile and Argentina. Other burrowing birds are puffins, kingfishers, and bee-eaters.

Kangaroo mice construct burrows in fine sand.

Invertebrate burrows

Scabies mites construct their burrows in the skin of the infested animal or human. Termites and some wasps construct burrows in the soil and wood. Some ants construct burrows in the soil to house their colonies. Some sea urchins and clams can burrow into rock.

The burrows produced by invertebrate animals can be filled actively or passively. Dwelling burrows which remain open during the occupation by an organism are filled passively, by gravity rather than by the organism. Actively filled burrows, on the other hand, are filled with material by the burrowing organism itself.

The establishment of an invertebrate burrow often involves the soaking of surrounding sediment in mucus to prevent collapse and to seal off water flow.

Examples of burrowing invertebrates are insects, spiders, sea urchins, crustaceans, clams and worms.

Excavators, modifiers, and occupants

Burrowing animals can be divided into three categories: primary excavators, secondary modifiers and simple occupants. Primary excavators are the animals that originally dig and construct the burrow, and are generally very strong. Some animals considered to be primary excavators are the prairie dog, aardvark and wombat. Pygmy gerbils are an example of secondary modifiers, as they do not build an original burrow, but will live inside a burrow made by other animals and improve or change some aspects of the burrow for their own purpose. The third category, simple occupants, neither build nor modify the burrow but simply live inside or use it for their own purpose. Some species of birds make use of burrows built by tortoises, which is an example of simple occupancy. These animals can also be referred to as commensals.

Protection

Fossil burrows

Burrows are also commonly preserved in the fossil record as burrow fossils, a type of trace fossil.

References

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References

1. (1993-01-01). "In situ assessment of modification of sediment properties by burrowing invertebrates". Marine Biology.
2. (1972). "Further Notes on Polar Bear Denning Habits". Bears: Their Biology and Management.
3. Dubiel, Russel. (May 1987). "Lungfish Burrows in the Upper Triassic Chinle and Dolores Formations, Colorado Plateau". Journal of Sedimentary Petrology.
4. Varricchio, David J.. (2007). "First trace and body fossil evidence of a burrowing, denning dinosaur". [[Proceedings of the Royal Society B: Biological Sciences]].
5. O. J., Reichman, Stan. C. Smith. (1990). "Current Mammalogy". [[Plenum Press]].
6. Harrington, Monica. (April 2014). "What a woodchuck could chuck". Lab Animal.
7. O. J., Reichman, Stan. C. Smith. (1990). "Current Mammalogy". Plenum Press.
8. (2013). "Mapping the distribution of the main host for plague in a complex landscape in Kazakhstan: An object-based approach using SPOT-5 XS, Landsat 7 ETM+, SRTM and multiple Random Forests". International Journal of Applied Earth Observation and Geoinformation.
9. (2015). "Spatial distribution patterns of plague hosts : point pattern analysis of the burrows of great gerbils in Kazakhstan". Journal of Biogeography.
10. Old JM, Hunter NE, Wolfenden J (2018). Who utilises bare-nosed wombat burrows? Australian Zoologist. 39, 409-413. DOI: 10.7882/AZ.2018.006
11. (2019). "Mapping out bare-nosed wombat (''Vombatus ursinus'') burrows with the use of a drone". BMC Ecology.
12. (2012-06-06). "burrow". [[National Geographic Society]].
13. C. Michael Hogan, (2008) [http://globaltwitcher.auderis.se/artspec_information.asp?thingid=232 ''Magellanic penguin'', Globaltwitcher.com, ed. Nicklas Stromberg]
14. (1994). "The Palaeobiology of Trace Fossils". [[John Wiley & Sons]].
15. Mukherjee, Aditi., Pilakandy, Rajan., Kumara Honnavalli Nagaraj., Manchi, Shirish S., Bhupathy, Subramanian.. (June 2017). "Burrow characteristics and its importance in occupancy of burrow dwelling vertebrates in Semiarid area of Keoladeo National Park, Rajasthan, India". [[Journal of Arid Environments]].
16. Kinlaw, Al. (1999). "A review of burrowing by semi-fossorial vertebrates in arid environments". Journal of Arid Environments.
17. (2018). "Who utilises bare-nosed wombat burrows?". Australian Zoologist.
18. O. J., Reichman, Stan. C. Smith. (1990). "Current Mammalogy". Plenum Press.
19. (2018). "Extended winters entail long-term costs for insect offspring reared in an overwinter burrow". Journal of Thermal Biology.
20. Fenner, A. L., Bull, C. M.. (August 17, 2010). "Central-place territorial defence in a burrow-dwelling skink: aggressive responses to conspecific models in pygmy bluetongue lizards".
21. (May 2003). "Portal Orientation and Architecture of Burrows in Tympanoctomys barrerae (Rodentia, Octodontidae)". Journal of Mammalogy.