Bengaluru: Karnataka’s grasslands are witnessing an unusual surge in migratory bird activity this season, with several birds arriving earlier than expected and some rare species being recorded in open landscapes across the state.

Birdwatchers and naturalists have reported increased activity in grassland habitats, highlighting the ecological importance of these often-overlooked landscapes. The early arrivals and unusual sightings have also drawn attention to the seasonal changes that influence bird migration across Karnataka.

Grasslands, wetlands and scrub ecosystems provide feeding and resting grounds for a wide range of birds. In places such as Hesaraghatta on the outskirts of Bengaluru, the combination of open grassland, seasonal water bodies and scrub supports both resident and migratory species.

Early arrival of migratory birds draws attention

Migratory birds generally move between breeding and wintering grounds in response to seasonal changes in temperature, food availability and habitat conditions.

The early appearance of migratory birds in Karnataka has therefore become a point of interest among birdwatchers. Such observations can provide useful information about changing seasonal patterns and the availability of suitable habitats.

The current rush is particularly significant because many grassland species depend on specific open habitats that are becoming increasingly fragmented.

Unlike forests, grasslands can sometimes appear to be relatively simple ecosystems. However, they support insects, small mammals, reptiles and a diverse range of plants that form an important food web for birds.

Hesarghatta Lake, for instance, contains a mosaic of open grasslands, seasonal wetlands and scrub. Birding observations from the area have recorded waterbirds, raptors, pipits and other species associated with these habitats.

Rare sightings add to the excitement

The season has also produced interest because of sightings of birds that are not regularly encountered.

For birdwatchers, rare sightings are important not merely as photographic opportunities but also because they can indicate the continued presence of suitable habitat.

Karnataka’s grasslands have historically supported several specialised bird species. The Lesser Florican, for example, is closely associated with grassland ecosystems and has become increasingly difficult to find as suitable habitat declines. Recent birding accounts have highlighted sightings around grasslands near Hesarghatta.

The Great Indian Bustard is another species historically associated with Karnataka’s open landscapes. Its population in the state has declined drastically, illustrating the pressures faced by specialised grassland birds.

The loss of open habitats can affect birds that depend on grasslands for feeding, nesting and breeding. Consequently, every reliable sighting of a rare or declining species can contribute to understanding the condition and distribution of these ecosystems.

Grasslands support more than migratory birds

The importance of Karnataka’s grasslands extends beyond seasonal migration.

These landscapes provide habitat for resident birds throughout the year. At Hesarghatta, birding observations have included species such as Indian Spot-billed Duck, Little Grebe, Black-winged Stilt, Glossy Ibis, Black-headed Ibis, Grey Heron, Eurasian Coot and several raptors.

Seasonal water patches can attract waders and waterbirds, while open areas provide feeding grounds for pipits, larks and other grassland species.

The presence of scrub and scattered vegetation adds another layer of habitat diversity, allowing birds with different feeding and nesting requirements to occupy the same broader landscape.

A recent guided bird walk at Hesarghatta recorded 45 species, including the Blue-faced Malkoha, Pied Kingfisher and Grey Francolin, demonstrating the diversity that can exist within a grassland-wetland mosaic.

Karnataka’s grasslands face habitat pressure

The increased attention on migratory birds comes at a time when grassland ecosystems across Karnataka face considerable pressure.

Grasslands can be mistaken for vacant or degraded land, leading to their conversion for infrastructure, agriculture, plantations and other uses. Urban expansion is another major pressure around Bengaluru.

The ecological value of these landscapes is increasingly being recognised. Hesarghatta, for example, has emerged as an important birding destination because of its remaining open habitat and seasonal wetlands. Conservation discussions around the landscape have focused on protecting its biodiversity and maintaining its grassland character.

Elsewhere in Karnataka, the Amrit Mahal grasslands provide another example of the scale of habitat loss. The ICAR-Indian Grassland and Fodder Research Institute reported in 2025 that these grasslands, once spread across more than 4 lakh acres around Independence, had declined to approximately 58,000 acres.

The decline demonstrates why grassland conservation is relevant not only to wildlife but also to traditional grazing systems and local livelihoods.

Migratory bird rush offers ecological clues

The arrival of migratory birds provides researchers and birdwatchers with an opportunity to observe how wildlife responds to seasonal and environmental conditions.

Bird numbers and species composition can change depending on rainfall, availability of water, food resources and conditions at breeding and wintering locations.

Regular observations can therefore help build a clearer picture of changes taking place in Karnataka’s ecosystems.

For citizen birdwatchers, documenting sightings with photographs, dates and locations can also contribute to broader biodiversity records. However, rare sightings need to be carefully verified before being treated as confirmed records.

Need to protect open landscapes

The latest bird activity highlights the need to look beyond conventional forest conservation when discussing biodiversity.

Some birds require open landscapes rather than dense tree cover. Planting trees indiscriminately in natural grasslands can alter the character of the ecosystem and affect species that depend on open terrain.

Maintaining grassland, scrub and wetland mosaics can therefore be important for supporting different bird communities.

Hesarghatta’s bird diversity illustrates how even a landscape near a major city can continue to provide habitat for a variety of species when open spaces and seasonal water sources remain available.

A season worth watching

The unusual early movement of migratory birds and reports of rare sightings have brought Karnataka’s grasslands into focus during the current season.

For birdwatchers, the coming weeks could provide further opportunities to document migratory species as winter movements continue. For conservationists, the observations reinforce the ecological importance of maintaining grasslands, wetlands and scrub habitats.

The current rush is therefore more than a seasonal spectacle. It offers a reminder that Karnataka’s open landscapes are functioning ecosystems that support resident wildlife as well as birds travelling across long distances.

Conclusion

Karnataka’s grasslands are witnessing increased migratory bird activity, including early arrivals and unusual sightings. The trend has renewed attention on the ecological value of grasslands and the need to protect these habitats from continued fragmentation and degradation.