The Aravalli Range is among the oldest geological formations on Earth. Formed during the Precambrian era, its parent rocks date to approximately 3.5 billion years ago — older than most life on land. The range runs for roughly 800 kilometres from the Rann of Kutch in Gujarat, through Rajasthan, and terminates in a narrow northern spur that passes through Delhi before disappearing beneath the alluvial plains of Haryana. What remains in Delhi is the Delhi Ridge: a discontinuous line of quartzite and schist hillocks, seldom more than 80 metres above the surrounding plain, covered in dry tropical thorn forest.

Its age is the argument. These are not hills that formed alongside the Himalayas and can be understood in terms of current tectonic activity. They are remnant erosional features — what remains after billions of years of weathering. They cannot be restored. They can only be lost.

Within Delhi, the Aravalli is present as four segments of the Ridge: Northern (spanning from Wazirabad to Haiderpur), Central (the Kamla Nehru Ridge, the primary lung of North Delhi), Southern (stretching through Sanjay Van, Asola Bhatti, and Tughlaqabad), and South-Central (the Mehrauli Archaeological Park zone). Together, these cover approximately 7,784 hectares of designated forest land — representing one of the largest urban green corridors in any Asian megacity.

The Ridge functions as Delhi's primary biodiversity corridor, linking fragmented patches of habitat across a city of 20 million people. Its dry deciduous scrub forest — dominated by Ber (Ziziphus mauritiana), Dhak (Butea monosperma), and Vilayati Kikar (Prosopis juliflora) — provides nesting, foraging, and overwintering habitat for over 200 resident and migratory bird species, as well as jackals, nilgai, and the occasional leopard in the southern segments.

The Aravalli Biodiversity Park in Gurugram — technically outside Delhi's administrative boundary but ecologically continuous with the Ridge — covers a further 380 hectares and has been the site of active ecological restoration since 2010.

The Ridge and the broader Aravalli have been inhabited and managed by Gujjar and Mewati pastoral communities for centuries. Gujjar communities maintained traditional grazing routes through the scrub forest, and their seasonal presence contributed to the mosaic habitat structure — patches of open grassland interspersed with dense thorn scrub — that many ground-nesting species depend on. The designation of the Ridge as a Reserved Forest under British colonial administration in 1913, and the subsequent exclusion of Gujjar communities from traditional use areas, marked the beginning of a governance model that treated the Ridge as a resource to be administered rather than a commons to be negotiated.

The tension between administrative protection and lived use has never been resolved. Gujjar families continue to live in villages adjacent to the Southern Ridge. Their ecological knowledge — which plant species indicate water, which bird calls signal the approach of predators, where the soil conditions shift — constitutes a form of environmental monitoring that predates the instruments of the archive by generations.

The British colonial survey of the Aravalli introduced a classification problem that has never fully been resolved: what exactly counts as "forest"? Colonial administrators designated portions of the Ridge as Reserved Forest under the Indian Forest Act of 1878, but the categorisation was incomplete, inconsistent across administrative boundaries, and driven by the extractive logic of colonial forestry — timber yields, grazing revenue — rather than ecological function. Revenue land, agricultural land, scrub wasteland, and forest land were classified under different administrative regimes, often adjacently, with the boundaries drawn more for administrative convenience than ecological coherence.

This inherited categorisation problem is the direct ancestor of the 2025 Supreme Court dispute over what constitutes "forest" in the Aravalli. The colonial survey created the ambiguity. The post-independence state reproduced it. The question of the 100-metre altitude threshold is, at its root, a question about what kind of evidence — ecological, administrative, topographic — should be used to determine what counts as forest when the original records were never adequate to begin with.

Delhi's population grew from roughly 1.4 million at independence in 1947 to an estimated 33 million in 2026. The Ridge has been continuously encroached upon throughout this period. The Northern Ridge lost significant area to institutional development — the Delhi University campus, the Hindu Rao Hospital complex, the Flagstaff area — in the 1950s and 1960s. The Southern Ridge has faced sustained pressure from quarrying (particularly in the Asola and Bhatti zones), illegal colonisation, and the expansion of peripheral settlements.

Gurugram's rapid commercial development from the 1990s onward consumed large sections of the Haryana Aravalli, replacing scrub forest with gated residential compounds, tech parks, and shopping malls. The Faridabad industrial corridor to the south has similarly encroached on ridge land, with quarrying operations running in areas the Supreme Court had specifically ordered protected. The pattern is consistent: legal protection is declared; enforcement is nominal; encroachment proceeds; fines are levied; operations continue. The ridge shrinks.

Before the phonograph, before magnetic tape, before the neural networks that now identify a bird from a two-second spectrogram — there was only the human ear and the imprecise grammar of adjectives. Thomas C. Jerdon, a British army surgeon stationed in India, spent three decades attempting to transcribe the calls of the subcontinent's birds into what he called "vocal syllables": phonetic approximations written into field journals. The sound vanished the moment it was produced. Only the description remained.

"In giving the notes of birds," Jerdon wrote in his introduction to The Birds of India (Calcutta, 1862), "I have endeavoured as much as possible to render these in a manner intelligible to the general reader, by the use of syllables expressive of the sound." The project was doomed to incompleteness by its medium. What he produced was not a recording but a wound — an absence shaped like sound. His syllables are not the call; they are the call's shadow on the page.

Mapping Dissonance begins from Jerdon's problem. The question he could not solve — how to make a sound persist — has been technically resolved by the recording apparatus. But the question beneath his question remains: what is the status of a call that has no one left to hear it? The archive records presence. Its implicit subject is disappearance.

Every bird in this archive carries at least three names: its English common name — a colonial administrative convenience, often derived from morphology or habitat; its Linnaean binomial — a classificatory system that produces the fiction of universal legibility at the cost of all local particularity; and its names in Hindi, Rajasthani, and Tamil — each encoding a different ecological relationship, a different history of encounter, a different theory of what the animal is.

The Koel (Hindi) and the Kuil (Tamil) are the same bird: the Asian Koel, Eudynamys scolopaceus. But they are not the same name. One is embedded in the literary tradition of the North Indian plains, where the koel's call announces the monsoon and figures throughout classical poetry as an emblem of longing. The other belongs to a separate literary ecology, a different seasonal register, a different grammar of metaphor. The Linnaean name disregards both and records only the fact of the brood-parasitic reproductive strategy. The archive tries to hold all three registers open simultaneously, without collapsing the difference.

The following species have been recorded or are known to inhabit the Delhi Ridge and Aravalli corridor. Listed by IUCN Red List status, from most to least threatened. Local names given as Hindi / Rajasthani / Tamil. Status current as of IUCN Red List v2024-1.

As of March 2026, the Supreme Court order proposing to reclassify Aravalli land below 100 metres above mean sea level as "non-forest" remains in abeyance. The December 2024 stay is in force. No new date has been set for hearing of the main matter. The forest is protected by an interim order that can be lifted at the next substantive hearing. This is the condition in which this archive is being made.

In November 2025, the Supreme Court of India — in the context of long-running hearings on the classification of Aravalli land in Haryana and Rajasthan — circulated a draft proposal to define "forest" in the Aravalli context according to an altitude threshold: any land in the range lying below 100 metres above mean sea level would be reclassified as non-forest and would cease to be protected under the Forest Conservation Act, 1980. The proposal was advanced as a means of resolving the administrative ambiguity inherited from colonial classification — providing a clear, measurable, defensible criterion for what constitutes forest in a landscape where the boundaries have been disputed for decades.

The ecological consequences of applying this threshold would be severe. The Delhi Ridge rises to a maximum of roughly 130 metres. The threshold of 100 metres would effectively reclassify approximately 90% of the Ridge as non-forest land, removing its protection under the Forest Conservation Act overnight. The lower slopes — the transition zones between scrub forest and the surrounding urban fabric — are precisely the areas most critical for ground-nesting birds, for the movement of mammals between forest patches, and for the root systems that hold the quartzite hillocks together. The flat base of every hill would become legally available for development.

The Forest Conservation Act, 1980, prohibits the diversion of forest land for non-forest purposes without prior approval of the central government. Its application depends on a prior question: what counts as forest? The Act does not define the term. That definitional gap has been filled, unevenly, by a sequence of Supreme Court orders stretching back to the T.N. Godavarman Thirumulpad case (W.P. 202/1995), in which the court adopted a dictionary definition of "forest" — any land that, regardless of ownership, classification, or revenue status, bears the ecological characteristics of forest — and asserted that such land is protected regardless of whether it appears in official forest records.

The Godavarman order created the most expansive framework for forest protection in Indian legal history. It also created an administrative nightmare: if any ecologically forested land is protected, irrespective of its classification, then the boundaries of what is protected are permanently contested. The 100-metre altitude proposal is, in this context, an attempt to resolve that contest by replacing ecological criteria with a topographic criterion. The simplicity of the metric is its appeal. Its relationship to ecology is approximate at best and misleading at worst: altitude does not determine forest quality, biodiversity value, or ecological function.

In December 2024, responding to urgent applications from environmental lawyers, civil society organisations, and state governments, the Supreme Court stayed its own draft proposal pending further hearings. The stay was accompanied by an interim protection order maintaining the status quo — meaning that existing forest protection continues to apply to all land currently classified as forest or deemed forest in the Aravalli, regardless of altitude.

The stay does not resolve the underlying legal question. It suspends it. The court has not withdrawn the altitude proposal. It has not indicated that it will not ultimately adopt some version of it. The forest is protected by interim order, pending the outcome of proceedings that may, when finally decided, remove that protection retroactively. Everything built during this interval of protection — every nesting pair, every root system, every entry in this archive — exists in legal suspension.

The lower slopes and base areas of the Aravalli — the zones that would be reclassified under the 100-metre threshold — are among the ecologically richest parts of the range. Ground-nesting birds, including the Grey Francolin, the Black Francolin, the Indian Spotted Eagle, and the Egyptian Vulture, depend on the scrub and grassland mosaic of the lower slopes. The transition zones between rock and flat ground carry the highest root density, the richest invertebrate populations, and the most complex soil-water interactions of the landscape.

Mining companies with existing or pending lease applications have prepared documentation anticipating the reclassification. Should the altitude threshold be formally adopted, applications for quarrying licences on what is currently protected forest land could be filed within weeks. The machinery is ready. It is waiting for a legal instrument that, as of March 2026, remains in suspension.

This archive is not made in opposition to that legal instrument. It is made in the interval before it is decided. It records what is present now, in the condition of abeyance — in case, later, someone needs evidence that these things were here.

The legal history of the Aravalli is a ledger of fines paid and operations continued; of orders issued and compliance deferred; of eleven men dead in a mine that was operating at triple its permitted depth, and of the fine for that death subsequently stayed by the court that levied it. The following cases are documented entries. They are not complete. They are a sample from a record that runs for decades.

The consistent pattern is this: environmental law in the Aravalli has functioned as a price list. The fine is the cost of production. Once paid, the operation resumes. The legal apparatus does not stop the extraction — it schedules it.

This project was made possible by the Polymorphic Futures web residency programme at Akademie Digital Solitude. The Digital Solitude residency has provided the time, space, and intellectual framework for this work — a generous invitation to think, research, and build something that was ambitious out of curiosity.

Sincere gratitude to Barbara Cueto, Sarah Donderer and Grayson Earle for their support throughout the process.

The development of this project is rooted in a lineage of stories and shared observations. It began with my father’s love for lore and fables, and the nightly ritual of bedtime stories for my brother and me as children, which established a lifelong grounding in the art of listening and dreaming.

This archive is the result of a collective shift in perspective and the steady support of those who have shaped my journey. My worldview was fundamentally altered through the Agents of Malarkey project with Anish Cherian, while the Dawn Chorus walks with Surbhi Mittal provided the necessary discipline to move beyond passive hearing and begin truly listening to the city’s avian life. The forced silence of the pandemic acted as a final catalyst, making the impact of noise on our shared ecology impossible to ignore.

None of this work would have been possible without the unwavering support of my brother, my father, and my mother. I owe a deep debt of gratitude to the friends I have been blessed with since my school days; those quiet hours spent by the lake in Avadi were the seeds of this project’s curiosity. Finally, to the community of friends I was blessed to find through my journey, who constantly challenge and inspire me with their own practice (you know who you are): thank you for keeping me on my toes.

This work is a synthesis of countless walks and conversations with friends and family, all of which centered on the past, present, and future of the landscapes we inhabit. Each of these collaborations and moments has contributed to the "Watcher" perspective that defines this archive.

Gratitude to everyone who is contributing field recordings, signing the care ledger, or submitting stories to this archive. The archive is made of your testimony.

This project draws on open datasets and open-source tools: BirdNET-Analyzer (Cornell Lab of Ornithology / Kahl et al.), the IUCN Red List API, OpenStreetMap / Nominatim geocoding, MapLibre GL for map rendering, and the Cornell Lab Xeno-canto dataset on which BirdNET was trained. All audio recordings remain the property of their contributors and are not used for AI training.