Urban environments and landscapes are evidently different from non-urban habitats which are natural. The transformation of the landscape, switching major difference from naturally green zones to humanly devised structures and impermeable surfaces is the main reason for this difference. In order to endure the urban locales, birds are required to accept or evade new conditions. In addition to the above factors, the urban stretch is leading to anextremely fragmented scenery, with islands of suitable bird environment enclosed by roads and buildings that often act as fences, even for movable creatures like birds. Lack of insects halters successful breeding of birds in urban areas.
These changed conditions have transformed the bird life intensely. Many species are endangere dafter an area is developed, followed by noteworthy loss of local diversity. However, some classes of birds seem to flourish in cities. These urban-dwelling types of birds very often demonstrate marked phenotypic differences in their physiology,morphology and behavior with their rural counterparts.
These phenotypic variations have been connected to explicit urban discerning drivers. The drivers include air pollution, false lights, clamor and different food types. Along these other urban drivers includedissimilar predation pressure besidesdifference in human turbulences. Nevertheless, these drivers are frequentlymystified, making it hard to identify one urban influence as the key driver for diversity. While urban habitat is a huge threat to diversity of birds, it isexciting setting for education on population discrepancy, evolutionary rejoinders, and finallyreal-time speciation.
Moreover, with large concrete structures replacing green areas, the birds do not have access to insects which is their favorite food. Most of birds survive and thrive on insects. A lack of insects to feed on is causing some species of birds to vanish in urban environments.