Majority of Siberian migratory birds have stopped visiting Pakistan
Due to climatic changes vast Majority of Siberian migratory birds have stopped visiting Pakistan. Some estimates say unto 70% birds are not visiting Pakistan, a region which was once teaming with birds.
In winter, Siberian temperature drop below 20 Degree C, Thus birds migrate towards warmer climate. The migratory bird From Siberia, Fly to Pakistan via Afghanistan, where they hug along the the Indus River on the way to Sindh. Along the way many lakes in the region remain their temporary home throughout Pakistan with longer stay in Sindh before they head back to Siberia for summers.
There are number of reasons for the decline in the bird numbers. One of the major reason is less rainfall. As climate changes it changes the weather patterns, namely rainfall patterns becomes erratic. As rains arrive either early or late it does not provide the temparate climate conditions birds are looking for. Not only that it effects the salinity of the lakes where birds make temporary stops. This forces the birds to find more suitable habitats which are more suited to there needs.
In addition human causes such as deforestation or excessive use to water from natural reservoirs also leaves an impact.