Over the year’s birds have been used as bioindicators of environment, pollution, ecosystem health, contamination globally. Bioindicators are species used to appraise the health conditions of the environment and they are capable of determining the environmental integrity if their functions and populations are put into consideration. Birds are good indicators because they are very easy to detect and their presence is easy to observe in any environment. Apart from that, in classification individual species are easy to identify with their wide distribution. The response to changing environment is by changing their composting behaviour and population. The reduction in number of migratory birds in the three wetland sites and number of actual wetland birds was also less. This may be due to large influence of human activities in these three wetland sites, which disturbs the natural breeding and nesting sites of migratory and local birds. Therefore, using birds as bioindicators is necessary for ecological evaluation which promotes conservation of bird species.