DISCUSSION
Most agricultural and natural landscapes have several pest species that rapidly increase in population size and by causing significant ecological and economic damage. Since natural vegetation is uncommon in agroecosystems, the majority of birds depend cultivated areas such as plantation and paddy fields for survival. Birds in agricultural belts are generally small groups of opportunists which are able to exploit the changing environment caused by agricultural practice and are human commensals. Farmers drive away roosting birds from plantations by using fireworks due to the damage caused by communally roosting birds to the coconut flowers and fronds. Harvesters destroy the nest and nestlings of the breeding birds found in the tree during fruites collection. Usually very less amount of pesticide is using tree pests and also for different crops so it is an ecofriendly system which indirectly conserve a habitat of resident bird fauna. In villages awareness about the role of this Treepie in agriculture to farmers and villagers will helps to conserve these associated birds. To be potential biocontrol agents of agricultural pests, birds need to have a density dependent response to pest outbreaks. A numerical response can be achieved either by higher species richness of insectivorous birds or density of an important insectivorous species. Nevertheless, birds generally contribute to maintain low abundance levels of insect pests and have no impact left during out breaking conditions. Insects, in order to avoid predators, use certain simple an On the beneficial role of tree pie from district Haripur will be helpful for further studies as a natural predator of numerous major pests of the trees and cultivated crops that remained unnoticed. Its ability to reach up to the bottom side of front trees which is not foraged by any other bird elevates its position as a special niche predator in trees. In addition to the hang feeding, shake and wait catch method of food capturing (Basheer et al. , 2010) is in agreement with the present finding. For all these reasons, biological control is preferable wherever possible. However, biological control is a complex matter and the controlling agent cannot always be found locally (Buchholz, 1999). Capacity of Treepie to feed upon adult and larvae of many insect pests on the lower surface of the leaflets indicates its utility as a natural predator and biological control agent. Among the insect pests consumed(Sadakathulla, 1991). The leaf-eating caterpillar, Opisina arenosella Walker is the most important lepidopteran pest of coconut palm in South Asia (Sadakathulla, 1991).While foraging, Indian Treepie tears open the silken webs on the leaflets and consume the caterpillars hiding beneath. Phytophagous chrysomelidae includes many established and potential agricultural pests and studies on host plants and ecology of Indian chrysomelids are highly inadequate (Kalaichelvan et al. , 2005). Chrysomelid beetles found on the tender leaflets of coconut and areca palm fronds and fed by Indian Treepi. Cultivation suffer severe damage mainly by rats (Rattus sp.) (Parshad, 1999a). Consumption of nestlings of pests like house rat and squirrel damaging (Parshad, 1999b), by Indian Treepie appears to be primarily due to their nesting site on the trees also reported in present study that the tree pie was found to be predator on the nestling of these species. Earwigs (Forficulidae) threaten the insect pollinators attempting to visit the female flowers (Geiser et al. , 2000), hence their predation by Indian Treepie enhances the pollination of the trees. It is essential that farmers should be made aware of the beneficial role of these birds as a natural predator of the several major pests of the trees crops and that the Indian Treepie is not a pest of any major food items or crops in the region. To the disappearance of this beneficial bird from the agricultural fields and it requires spreading awareness about its status as a beneficial bird among the farming community.