Aayusha Bhogati
Pokhara,
I still remember waking up each morning to the cheerful chirping of house sparrows outside my window during my childhood days. Their tiny bodies would flutter across rooftops, perch on electric wires, and gather in my garden corner, filling the air with life. However, in recent times, this cheerful melody has almost faded. The sparrows appear to quietly disappearing—but are we noticing before it’s too late?
House sparrows (Passer domesticus) have long been recognized as ecological indicators as their presence or absence reflects the overall health of an environment. Known for their lively chirps and close association with human settlements, there are increasing reports of sparrows vanishing from locations such as Pokhara, Kathmandu, Chitwan, and beyond. Observing the situation from Chitwan, residents across Bharatpur, Ratnanagar, and surrounding towns have noted a sharp decline in sparrow sightings, reflecting a national trend throughout Nepal. Mr. Sapkota, a local resident of Padampur, Chitwan, reports that “In places like Padampur or the outskirts of Bharatpur, where greenery still exists, sparrows are holding on, but in central markets and residential areas, their numbers are much lower than they were a decade ago.”
Bird Conservation Nepal (BCN) reports similar trends across the country. Although the house sparrow is not currently classified as endangered, its declining numbers are alarming, especially in urban areas of Nepal. According to ornithologists, the causes of this decline are complex and include factors such as the reduction of green spaces, the replacement of traditional homes with concrete buildings, the widespread use of chemical pesticides, and potential radiation from mobile towers.
A study by the Indian Council of Agricultural Research (ICAR), supported by findings from South Asia, including Nepal, indicates that the decline of sparrows is a regional issue driven by habitat loss and changes in lifestyle. Conservationists in Nepal share these concerns, emphasizing that even common species can become threatened if they are neglected.
The following are key factors contributing to the decline of House sparrows:
- Rapid Urbanization and Habitat Loss
One of the primary reasons for the decline is the rapid urbanization sweeping across Nepal. Traditional houses with thatched roofs and open eaves provided ideal nesting sites for sparrows. However, these structures are increasingly being replaced by concrete buildings that lack suitable cavities for nesting. This architectural shift has drastically reduced the available habitat for sparrows to breed and roost. - Environmental Pollution and Pesticides
The widespread use of pesticides and chemical fertilizers in agriculture poses a significant threat to House sparrows. Sparrows feed on small insects, which are killed by pesticides, reducing their food supply. Additionally, pesticide residues in grains and insects can poison sparrows directly, leading to increased mortality. - Electromagnetic Radiation and Noise Pollution
Research indicates that radiation from mobile phone towers disrupts the navigational abilities and reproductive health of sparrows, leading to brain damage and disorientation. Additionally, urban noise pollution impairs their natural behaviors, further impacting their survival. - Climate Change and Rising Temperatures
Increasing temperatures, particularly in the Terai region, have created less hospitable conditions for sparrows, damaging eggs and making nesting uncomfortable, potentially leading to local extinction. - Predation and Competition
The rise of natural predators, such as crows and cats, in urban areas exacerbated by poor waste management poses additional threats to sparrow populations already facing significant survival challenges.
However, these threats can be mitigated if we consider taking the following measures in action:
- Promoting the use of bio-fertilizers to reduce pesticide use.
- Creating awareness about sparrow friendly urban planning, including preserving traditional nesting sites or installing nest boxes.
- Reducing electromagnetic pollution and managing noise levels.
- Protecting natural habitats and improving waste management to control predator populations.
Although the house sparrow is still classified as “Least Concern” on the IUCN Red List, there have been noticeable local declines in its population across South Asia. In Nepal, there is a lack of comprehensive nationwide data on house sparrows, but various anecdotal reports and smaller studies consistently indicate decreasing numbers, particularly in urban areas. This decline is often seen as a sign of ecological imbalance in cities. In response, environmental activists are advocating for heightened public awareness, the development of bird friendly urban architecture, and community led monitoring initiatives. To raise awareness about these issues, World Sparrow Day is celebrated globally every year on March 20, serving as a reminder to reconnect with urban nature and take proactive measures before these birds disappear altogether.
In conclusion, sparrows have long been a part of our natural world, symbolizing the harmony between humans and nature. Their gradual decline serves as a warning that our environment is becoming unbalanced. If we don’t take action now, future generations may only know of sparrows through tales and stories. By creating more bird friendly urban spaces and being mindful of our surroundings, we can help usher back their cheerful songs into our mornings.