House Sparrow (English Sparrow)
The sparrow that followed humanity
Wildlife Expeditions
Wildlife of
Wildlife of
Delhi
A megacity with surprising wild edges-Aravalli Ridge scrub and Yamuna wetlands bring leopards, jackals, and thousands of migratory birds into Delhi's shadow.
6
Species
1,484 km²
Land Area
About Delhi
Even though Delhi is very urban, it still keeps a natural side shaped by two main features: the ancient Aravalli outcrops of the Delhi Ridge and the Yamuna River corridor. These areas are green refuges in the city, supporting mammals like jackal, nilgai, and civets, and birds, reptiles, and pollinators in scrub, woodland, and river-edge habitats. Key ecosystems are the thorn-scrub and dry deciduous patches of the Ridge, such as Sanjay Van and Asola Bhatti, which give cover, dens, and movement routes for medium-sized carnivores and herbivores. Along the Yamuna, floodplain wetlands, marshes, and riverine grasslands—especially near the Okhla barrage wetlands and Okhla Bird Sanctuary—are vital stopovers and wintering grounds on the Central Asian Flyway for waterfowl, waders, raptors, and reedbed birds. What makes Delhi special is how close these wild places are to neighborhoods, roads, and monuments, so people can move from scrub to wetlands in one morning.
Geography
Delhi's wildlife is shaped by an urban setting on the Indo-Gangetic plains. Habitat is mainly in two lines: the Yamuna River and floodplain wetlands, key for waterbirds and migratory species; and the rocky Delhi Ridge (northern Aravalli outcrops) with dry deciduous and scrub plants. Biodiversity also survives in protected ridge fragments (Asola-Bhatti), river corridors, lakes, and urban greenspaces.
1,484 km²
Land Area
Among India's smaller union territories; roughly the 5th smallest UT by area
Size Rank
India
Country
Union_territory
Type
Elevation Range
Approx. 200-320 m above sea level (lowest along the Yamuna floodplain; highest on southern ridge outcrops)
Key Landscapes
Official Wildlife Symbols
bird
House Sparrow
Designated 2018
tree
Golden Shower Tree
Protected Areas
Delhi has no National Parks but keeps important protected areas: one Wildlife Sanctuary, Ridge/Aravalli reserved and protected forests, biodiversity parks, and wetlands and floodplains along Yamuna and Najafgarh. These areas form the city’s main wildlife habitat, with dry Aravalli scrub-thorn, seasonal wetlands, and winter migratory birds. The Delhi Forest Department and DDA manage restoration, cut fragmentation, and handle human-wildlife issues.
Protected Coverage
Approximately ~8-10% of Delhi's land area is under some form of notified forest/protected status or dedicated biodiversity conservation management (strictly notified wildlife-protected area is much smaller-dominated by Asola Bhatti Wildlife Sanctuary at ~2% of NCT).
State & Provincial Parks
Tughlaqabad Biodiversity Park (DDA, Delhi)
≈0.8-1.0 km² (≈80-100 ha, approximate)Restored Aravalli scrub and woodland on degraded terrain near historic Tughlaqabad, valuable for native dryland flora, reptiles, and edge-forest bird communities in South Delhi.
Neela Hauz Biodiversity Park (DDA, Delhi)
≈0.1 km² (≈10 ha, approximate)A compact but important urban wetland restoration site that improves local hydrology and supports wetland birds, amphibians, and dragonflies-useful for close-range wildlife viewing in an urban neighborhood.
Tilpath Valley Biodiversity Park (DDA, Delhi)
≈0.2-0.3 km² (≈20-30 ha, approximate)Restoration landscape along the southern Ridge zone emphasizing native Aravalli vegetation, grassland patches, and seasonal wet areas-supporting birds of open scrub, small mammals, and reptiles.
Wildlife Refuges
Sanjay Van (Southern Ridge Forest, Delhi)
≈3.2 km² (≈780 acres, approximate)A well-known Ridge forest patch functioning as an urban refuge for mammals, owls, and woodland/scrub birds; important as part of the Southern Ridge connectivity toward the Aravallis and Asola landscape.
Kamla Nehru Ridge (Northern Ridge, Delhi University area)
≈0.3 km² (≈30 ha, approximate)A key Northern Ridge habitat block with mature woodland/scrub and high urban bird diversity; valuable for raptors, parakeets, and small mammals in the city core.
Central Ridge Forest (Budh Jayanti Park-Ridge belt, Delhi)
Part of the Central Ridge complex; several km² combined (site boundaries vary by block)A comparatively continuous Ridge segment that supports scrub-forest fauna and acts as a movement corridor for urban-adapted mammals and birds; good for early-morning wildlife viewing in woodland habitat.
Wilderness Areas
- Asola-Bhatti interior ridge-and-ravine tracts (least-disturbed Aravalli habitat in Delhi, away from main entry points)
- Southern Ridge corridor patches linking Sanjay Van toward the Asola landscape (fragmented but ecologically important)
- Yamuna floodplain stretches with seasonal wetlands and grasslands (best remaining riverine 'open space' habitat, though highly pressured)
- Najafgarh drain embankments and remnant marsh pockets (seasonal, semi-wild wetland edges with high bird value)
Wildlife
Though very urban, the National Capital Territory of Delhi has surprising wildlife formed by three main habitats: (1) the Yamuna River corridor with floodplain wetlands (e.g., Okhla Bird Sanctuary, Najafgarh Lake and drain, Wazirabad-Jagatpur), (2) the semi-arid Delhi Ridge—northern Aravallis with scrub forest, ravines and rocky outcrops (e.g., Asola Bhatti Wildlife Sanctuary), and (3) a network of urban parks, biodiversity parks and farm edges that act as stepping-stone habitats. Common large species include nilgai, jackals, kites and peafowl. Many migratory waterbirds and raptors visit in winter.
~35-45 species (urban-adapted carnivores, ungulates, bats, small mammals; highest diversity around Ridge/Asola and riverine edges)
Mammals
~430-470+ species recorded (very high for a city-region due to Yamuna wetlands and winter migration)
Birds
~30-45 species (lizards, monitors, geckos, skinks, snakes; strongholds on the Ridge and scrub)
Reptiles
~8-15 species (mostly frogs/toads associated with monsoon pools, wetlands, and urban waterbodies)
Amphibians
~60-100+ species historically/regionally reported from the Yamuna system; composition locally constrained by pollution and altered flows
Fish
Iconic Species
Nilgai (Blue Bull)
The most visible large wild mammal in Delhi's Ridge-Asola-farm-edge mosaics; frequently encountered on the city's fringes and a defining 'urban megafauna' experience.
Golden Jackal
A signature carnivore of Delhi's scrub, ravines, and floodplain edges; often heard at dusk/night and increasingly recorded around peri-urban habitats.
Indian Peafowl
Common in many green spaces and Ridge tracts; a charismatic flagship species that visitors readily see and hear, especially during the breeding season.
Black Kite
One of Delhi's most conspicuous raptors, often seen in large numbers over markets, landfills, and river corridors; a hallmark of the city's aerial wildlife.
Indian Grey Hornbill
A well-known Delhi Ridge bird, frequently seen in wooded parks and ridge scrub; valued as an indicator of mature tree cover in the urban landscape.
Painted Stork
A winter-season wetland flagship around Okhla and other Yamuna-associated wetlands; large, photogenic flocks make it a key visitor draw.
Oriental Darter
A notable wetland specialist regularly recorded in Delhi's better wetland patches; its snake-like swimming profile is a classic sight for birders at Okhla.
Bengal Monitor
A large, impressive lizard of Ridge scrub and urban edges; frequently encountered in warmer months and among Delhi's most recognizable reptiles.
Indian Cobra
A culturally iconic snake occurring in Delhi's scrub/edge habitats; sightings are uncommon but highly memorable and important to human-wildlife coexistence narratives.
Indian Gazelle (Chinkara)
A classic Aravalli scrubland ungulate that may occur in/around the Asola-Bhatti landscape (often patchy and elusive); when seen, it strongly defines the Ridge-Aravalli wildlife feel.
Endemic & Rare Species
Notable Populations
- Large winter congregations of waterbirds (ducks, geese, waders, storks, cormorants) at the Okhla Bird Sanctuary (in Uttar Pradesh, adjacent to Delhi) and associated Yamuna floodplain wetlands, making Delhi a major urban birdwatching destination in north India.
- High-density urban/peri-urban Black Kite populations and communal roosting/foraging behavior-one of the most conspicuous raptor assemblages in an Indian metropolis.
- Regionally important populations of nilgai across the Ridge-Aravalli fringes and adjoining agricultural edges, representing one of the most visible large-herbivore presences inside/adjacent to a capital city.
- Golden jackal persistence and regularity in the Asola-Bhatti/Ridge landscape and some floodplain edges, indicating remaining trophic structure in semi-natural patches.
Recent Changes
- Apparent expansion and increasing visibility of adaptable mammals (notably nilgai and golden jackal) along Delhi's peri-urban edge, driven by scrub/edge habitat continuity and reduced persecution in some pockets-paired with rising human-wildlife conflict reports.
- Long-term, severe decline of vultures (including Egyptian Vulture) compared with historical levels; recovery remains limited despite diclofenac controls, due to continued poisoning risks, food changes, and disturbance.
- Wetland bird assemblages fluctuate with water quality, flow regulation, and invasive aquatic plants (e.g., water hyacinth); episodes of habitat degradation reduce fish-eaters and specialist waterbirds, while restoration actions can temporarily improve diversity.
- Biodiversity park restorations (e.g., Yamuna Biodiversity Park, Aravalli Biodiversity Park) have increased local habitat complexity, improving sightings of woodland/scrub birds, butterflies, and small fauna in rehabilitated areas.
- Increasing pressures from urban expansion, lighting, road mortality, feral/stray dog predation, and fragmentation-particularly affecting ground-nesting birds, reptiles, and small mammals in ridge and floodplain remnants.
Wildlife Viewing
Delhi is urban but good for wildlife around green "islands": the Yamuna floodplain and wetlands, Aravalli outcrops of the Delhi Ridge and protected parks. Expect many birds (best in winter), easy to see reptiles and small mammals in scrub and forest, and easy to reach raptor and waterbird watching, all a drive from central New Delhi.
Best Seasons
Winter (Nov-Feb)
Peak wildlife season. Large influx of migratory waterfowl and waders on the Yamuna floodplain and wetlands; big mixed flocks, raptors (harriers, kites, eagles), and great photography light. Early mornings can be foggy and cold; plan for later starts on heavy-fog days.
Spring (Mar-Apr)
Migration continues (passage migrants) with increasing song and breeding displays. Woodland birding improves on the Ridge; butterflies and dragonflies ramp up around wetlands. Comfortable temperatures for walking trails.
Summer (May-Jun)
Hot but active at dawn and near water. Good time for reptiles (lizards, monitor lizards, snakes-seen occasionally) and for watching urban-adapted raptors and owls around the Ridge and large parks. Midday wildlifeing is limited; focus on sunrise outings.
Monsoon (Jul-Sep)
Landscape turns green; breeding season for many resident birds, frequent bird calls, and strong insect life (butterflies/dragonflies). Wetlands can be dynamic with water levels and access; carry rain protection and plan flexible routes.
Post-monsoon / Autumn (Oct-early Nov)
Fresh vegetation, clearer mornings, and the start of migratory arrivals. Excellent time for a mix of woodland and wetland birding before peak winter crowds; great for relaxed multi-site days.
Top Wildlife Experiences
- Sunrise birding on the Yamuna Biodiversity Park (Wazirabad): walk the wetland edges and reedbeds for winter ducks, waders, kingfishers, and raptors; bring a scope/binoculars for distant waterfowl.
- Wetland and raptor day at Okhla Bird Sanctuary (on the Delhi-Noida border): scan the river and marsh for waterbirds, winter migrants, and birds of prey; best in winter mornings with a mid-morning light shift for photography.
- Explore the Aravalli scrub-forest at Asola Bhatti Wildlife Sanctuary: hike designated trails early for peafowl, nilgai sightings (sometimes), mongoose and jackal tracks, plus excellent dry-forest birding (babblers, woodpeckers, raptors).
- Walk the Delhi Ridge (Northern/Central Ridge zones) for 'urban wilderness' birding: focus on scrub and ridge slopes for warblers, parakeets, drongos, owls (often at dusk), and raptors riding thermals.
- Butterfly-and-dragonfly watching in Lodhi Garden and nearby green corridors (spring-monsoon): slow-paced photography-friendly outing that pairs well with an early-morning bird walk.
- Yamuna floodplain birding near Wazirabad-Jagatpur stretches: seasonal sandbars and wetlands can host waders, terns, and large congregations of waterbirds; go with a local guide to pick the best access points and minimize disturbance.
- Nightfall owl-and-bat listening walk on the Ridge/large parks (where permitted): short, quiet dusk outing to learn calls and behavior; best in warmer months when insect activity is higher.
Wildlife Watching Types
Guided Options
- Delhi Bird Foundation (DBF): bird walks, citizen-science style outings, and seasonal events around Delhi's key birding sites.
- Delhi Natural History Society (DNHS): regular nature walks, birding field trips, and biodiversity talks (often covers Ridge, wetlands, and urban parks).
- WWF-India (Delhi NCR programs): periodic nature education programs and guided walks/events (availability varies by season).
- Delhi Development Authority (DDA) Biodiversity Parks (e.g., Yamuna Biodiversity Park): interpretive trails and guided nature education programs-check official schedules/visitor information.
- Local birding guides for Okhla-Yamuna floodplain circuits: private half-day/full-day itineraries tailored to target species and best seasonal access points (book via Delhi birding communities or nature groups).
Ecosystems
Delhi (NCT) lies on the semi-arid edge of the Indo-Gangetic Plain by the Yamuna River. Intense city growth covers a mix of Aravalli ridge scrub and woodlands, river floodplain, parks, and man-made waterbodies. Main biodiversity spots are the Delhi Ridge (Aravalli outcrops), the Yamuna floodplain, and many wetlands and lakes that support local wildlife and migratory waterbirds.
Biomes
Tropical Dry Forest
Remnant tropical dry deciduous/thorn-scrub vegetation on the Delhi Ridge and other undeveloped patches; dominated by drought-tolerant trees and scrub (much of it now secondary growth and invasive-impacted).
Patchy and fragmented; mainly on the Ridge and protected greens (small proportion of the territory, but ecologically significant).
Savanna
Open grassy areas and scrub-grass mosaics in the Ridge, along portions of the Yamuna floodplain, and in fallow/managed open grounds where tree cover is sparse.
Localized pockets; often interspersed with woodland and urban open spaces.
Freshwater
The Yamuna River corridor, associated drains/canals, and a network of lakes/ponds and reservoirs that provide aquatic habitat (water quality varies widely by stretch/season).
Linear along the Yamuna plus scattered waterbodies across the city; extent fluctuates strongly with monsoon and abstraction.
Wetland
Seasonal floodplain wetlands, marshy depressions, sewage-fed wetlands, and lake-margin reedbeds that function as key bird habitats (notably around Okhla and other floodplain/waterbody complexes).
Scattered and highly fragmented; concentrated along the Yamuna floodplain and around major lakes/wetland parks.
Habitats
Urban
Dense built-up matrix with street trees, institutional greens, and urban parks that provide habitat for adaptable birds, bats, reptiles, and invertebrates.
Suburban
Lower-density edges with gardens, small groves, and mixed land use that can support higher local bird and pollinator diversity than the urban core.
Forest
Protected/managed wooded patches on the Delhi Ridge and larger biodiversity parks (often secondary woodland with dry-forest species and invasive control efforts).
Woodland
Open-canopy ridge vegetation on rocky Aravalli substrates; includes thorny scrub, acacias, and mixed planted natives/exotics.
Shrubland
Thorn scrub and degraded dry-forest understory on ridge slopes, fallow lands, and disturbed sites; important for small mammals, reptiles, and ground-nesting birds.
Grassland
Open grounds and floodplain grass patches (often seasonal), supporting raptors, seed-eating birds, and diverse insects where not heavily disturbed.
River/Stream
The Yamuna mainstem and side channels; habitat quality ranges from relatively better upstream reaches to heavily impacted urban stretches, yet remains crucial for connectivity and wildlife movement.
Wetland
Floodplain wetlands, reedbeds, and constructed/managed wetlands that host wintering waterfowl and waders; productivity often tied to monsoon and inflows.
Marsh
Reed- and sedge-dominated margins around lakes and floodplain depressions (e.g., bird-rich wetland edges), providing nesting/roosting cover.
Lake
Natural/modified and artificial lakes (e.g., city lakes and wetland reservoirs) used by waterbirds; water levels and eutrophication vary seasonally.
Pond
Smaller neighborhood ponds, temple ponds, and stormwater/harvesting ponds that act as stepping-stone habitats for amphibians, odonates, and birds.
Cliff/Rocky Outcrop
Rocky escarpments, quarry faces, and exposed Aravalli outcrops on parts of the Ridge providing roosting and niche microhabitats.
Agricultural/Farmland
Remaining peri-urban croplands and floodplain cultivation patches that support granivorous birds and edge fauna but are under rapid land-use change.
Plantation
Planted avenues, shelterbelts, and park plantations (mixed native/exotic) that add canopy and corridors, though ecological value depends on species composition and understory management.
Ecoregions
Conservation
Primary Threats
- Continuous expansion and densification (housing, commercial districts, informal settlements) drive conversion and fragmentation of remnant habitats-especially along the Yamuna floodplain and around ridge edges-reducing breeding and foraging areas for birds, reptiles, and small mammals.
- Loss of scrub, grass, and wetland microhabitats through encroachment, landfilling, landscaping "beautification," and conversion of open areas to built space. In Delhi this is especially acute for Yamuna floodplain patches and small urban wetlands/lakes that function as stepping-stones for migratory birds.
- Yamuna water quality is heavily impacted by sewage inputs, industrial effluents, and stormwater runoff; this reduces aquatic biodiversity (fish, turtles, invertebrates) and degrades wetland food chains that support wintering waterbirds. Air pollution and dust deposition also stress ridge vegetation and reduce urban ecosystem health.
- Road widening, new corridors, metro/rail expansions, riverfront works, and utilities frequently create edge effects, fragment ridge/floodplain habitats, and increase wildlife mortality risks (vehicle strikes) while enabling additional encroachment pressure.
- High footfall in ridge forests and floodplain areas (recreation, off-road driving in some patches, religious gatherings, dumping) disrupts nesting/roosting birds and pushes mammals (e.g., jackals, nilgai, occasional leopards) into suboptimal habitat or closer to human-dominated edges.
- Nilgai and wild pigs can enter farms/vegetable plots on the urban fringe and floodplain, causing crop damage and triggering calls for removal; occasional leopard movement near Asola-Bhatti and adjoining settlements creates risk perceptions and can lead to retaliatory actions or unsafe crowding around sightings.
- Delhi's large transport hub status increases risk of illegal wildlife movement and local poaching/trafficking (notably for pangolins and other Schedule-protected fauna), requiring sustained enforcement and rescue/rehabilitation capacity.
- In floodplain and wetland zones, invasive plants (commonly including water hyacinth and invasive terrestrial weeds) can choke waterbodies, alter hydrology, and reduce native plant diversity; on ridge edges, invasives can simplify understory structure and reduce habitat quality for native birds and insects.
- Hotter heatwaves, erratic monsoon rainfall, and altered flood pulses increase stress on urban forests and wetlands. In Delhi this can intensify water scarcity, reduce wetland persistence, raise fire risk on dry ridge scrub, and exacerbate pollution impacts during low-flow periods in the Yamuna.
- High water demand and groundwater extraction contribute to drying of small lakes/ponds and weaken base flows that support wetland persistence. This amplifies dependence on engineered water inputs and makes restored habitats more vulnerable during drought and heatwave years.
- Channelization/embankments, altered riverbank use, and engineered landscaping modify the Yamuna floodplain's natural dynamics. Reduced habitat heterogeneity (sandbars, seasonal wetlands, native riparian scrub) limits breeding/foraging niches for riverine and wetland-dependent species.
Did You Know?
Some of Delhi's best "wetlands" are accidental: **abandoned quarry pits** in the **Asola-Bhatti/Aravalli landscape** seasonally fill with rainwater, creating temporary lakes that attract waders and other waterbirds inside a dry, rocky forest matrix.
The Ridge forest isn't Himalayan. It is Aravalli-type semi-arid scrub. Some Ridge patches and biodiversity parks have plants and animals like Rajasthan-style dry thorn/scrub ecosystems, not the green riverside woods people expect.
**Nilgai (blue bull)** and **golden jackal** are not rare "outskirts" animals here: they regularly use **Yamuna floodplain grass-shrub mosaics** and Ridge green corridors, meaning large wild mammals persist and move through one of the world's most built-up capitals.
Delhi's wetlands attract long-distance winter migrants. Wet places around Najafgarh and the Yamuna floodplains have Central Asian/Siberian birds like bar-headed goose, northern pintail, and big winter raptors (e.g., steppe eagle).
Delhi's **only notified wildlife sanctuary** is **Asola Bhatti Wildlife Sanctuary (32.71 km²)**-the union territory's single largest legally protected wild habitat block inside the NCT.
The **Delhi Ridge** is the **northernmost extension of the Aravalli Range**, making Delhi the only Indian national capital with an in-city outcrop of one of the world's oldest hill systems supporting native dry-forest wildlife.
Despite being a megacity, **450+ bird species have been recorded within the NCT of Delhi** (combined records across the Ridge forests, Yamuna floodplains, and city wetlands), placing Delhi among India's most species-rich urban birdscapes.
The **Najafgarh Drain-marsh complex** functions as **Delhi's largest remaining wetland corridor**, regularly holding large winter congregations of waterfowl and serving as a major raptor-watching site within the capital's limits.
Animals Found in Delhi
6 species documented in our encyclopedia