The Indian House Crow: Background Essay

The Indian House Crow: Background Essay

The Indian House Crow ( Corvus splendens ) is a bird of the Crow household ( Corvidae ) . and has a great ecological flexibleness ( Nyari and Peterson. 306 ) . A indigen of southern Asia. the species has a broad distribution in states such as Nepal. India. Pakistan. Sri Lanka. amongst others ( Ottens. 69 ) . Harmonizing to Brook et Al ( 813 ) . the species is associated with human colonies wherever in all of its scope. Because of its ability to accommodate in a broad scope of human colonies. the species has invaded several locations worldwide. such as East Africa in 1897 ( Cooper. 381 ) and more late parts of Europe ( Ottens. 70 ) .

Predictive theoretical accounts ( Nyari. and Peterson. 306 ) has shown that the possible scope of the species include Central America. the Caribbean. equatorial West Africa. every bit good as mainland and insular Southeast Asia. which are yet to be colonized. The species close association with human existences coupled with its ability to be diet flexible has led to an detonation in its population. The species has a varied diet. which consists of garbage around human habitation. insects and other little invertebrates and little reptilians.

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It besides feeds on eggs. other birds’ baby birds. grains and fruits. Its extremely timeserving behaviour and a mostly omnivorous diet farther do it extremely adaptative. Problems with the species The House Crow has been a cause of jobs to people because of its wont of dispersing rubbish and damaging of electrical wiring. It has besides been reported to barricade waste pipes. In countries around airdromes. it is considered a possible danger as it can do bird work stoppage jeopardy to aircraft. Flocks of this bird are noisy and their dungs are a nuisance to the environment.

Ryall and Reid ( 32 ) province that the species is an agricultural plague and a disease vector. and it is believed to hold decimated a figure of native bird species. In its scope. the House Crow is a major agricultural plague. and is ill-famed for busting a assortment of harvests including wheat. corn and helianthus. Before it was extirpated in Australia ( Cooper. 381 ) . it caused extended harm to both veggies and fruit harvests such as Mangifera indicas. Psidium littorale. papaya. fig. apple. pear. grape and rock fruit. Additionally. the house crow has been reported to assail farm animal and putting to deaths domestic fowl. new-born calves every bit good as child caprine animals.

Injuries to adult farm animal and torment have besides been reported. It is besides a menace to an area’s avian ( bird ) diverseness. as it is known to kill and drive off other birds until it is the lone bird species in that country. As such. it poses a serious menace to any country’s biodiversity. particularly avian diverseness. Because of the species varied diet which includes carcases. the species can move as bearers of disease agents. Specifically. the Newcastle disease has been found in Indian House Crow in India ( Roy et al. 178 ) . Control mechanisms The close association of Indian house crows with worlds makes it a challenge to command its populations.

However. a figure of control mechanisms have been identified which can travel a long manner in commanding the species. These include: Poisoning- Harmonizing to an article in the National Geographic web site. Marshall states that one manner through which the species can be eliminated is through poisoning of their nutrient. However. attention should be taken to guarantee that this does non poison other birds. This is nevertheless improbable because house crows normally drive off all other species of birds. Timing is of the kernel. and it is recommended that this should be done during the genteelness season when they congregate at specific sites.

Intense searching of countries where the birds congregate should be done before poisoning. Monitoring of ships- Indian house crows have been known to utilize ships as their chief manner of colonising countries in which they are non natives. As such. a good manner to command them would be to guarantee that they do non colonise an country in the first topographic point. It is therefore a good thought to supervise ships for tenancy by the crows. every bit good as be on the sentinel for the birds along sea frontiers and appropriate actions taken before they spread farther inland.

Engendering control and habitat modification- Lamba ( 121 ) indicates that engendering of house crows is at least known to happen at sites run intoing a set of specific conditions. such as large-crowned trees. telephone towers and edifices. Such genteelness sites could be used to command their addition by remotion of nests coupled with devastation and alteration of sites they are likely to utilize for engendering. This should be intensive particularly during the genteelness season. Other control mechanisms that can be used to pull off the species include hiting and frightening with pieces and caparison.

Incentives may include wagess for entries of crow eggs and baby birds. Summary and decision With the planetary spread of the avian grippe and the menace of Indian House Crows to distribute the Newcastle disease. effectual control mechanisms are needed. such as those discussed above. However. before such control mechanisms are taken. it is of import that surveies be undertaken prior to their execution to find the degree of colonisation of the birds. Sufficient resources should be allocated for such programmes. as efforts to command these birds have antecedently been hindered by deficiency of sufficient support ( vitamin E.

g. in South Africa ) . Poisoning is particularly effectual if the right chemicals are used. but the deductions to the environment may be important if attention is non taken. Monitoring of ships. on the other manus. needs a acute oculus and expertness in bird behaviour for it to be effectual. A cardinal concern here is what should be done should a ship be found to hold the birds. as they are really cute and can easy get away. Finally. engendering control has its ain deductions. as the birds occupy some of the most critical sites such as telephone and electric pylons.

A combination of all the three attacks should be used to command the birds in an incorporate mode. Works cited Brook. B. W. . Sodhi. N. S. . Soh. M. C. K. . Lim. H. C. Abundance and projected control of invasive house crows in Singapore. Journal of Wildlife Management. 67. 4 ( 2003 ) :808-817 Cooper. J. E. “Health surveies on the Indian house crow ( Corvus splendens ) Avian Pathology” 25. 2 ( 1996 ) :381 Lamba. B. S. “The nidification of some common Indian birds. ” Part I. J. Bombay Nat. Hisl. Soc. 60 ( 1963 ) :121-133 Marshall. L. Alien Crows Targeted for Entire Extermination in S. Africa. 9 May 2006. 4 April.

2009. hypertext transfer protocol: //news. nationalgeographic. com/ Nyari. A. . Ryall. C. and Peterson. A. T. “Global invasive potency of the house crow Corvus splendens based on ecological niche modeling” . J. Avian Biol. 37 ( 2006 ) : 306-311. Ottens. G. “Background and development of the Dutch population of House Crows Corvus splendens” . Limosa 76. 2 ( 2003 ) :69-74. Roy. P. . Venugopalan. A. T. . Manvell. R. “Isolation of Newcastle disease virus from an Indian house crow. ” Tropical animate being wellness and production. 30. 3 ( 1998 ) :177-178 Ryall. C. and C. Reid. “The Indian House Crow in Mombasa. ” Bokmakierie 39 ( 1987 ) :113-116.



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