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How human-made noise is changing the call of an eye-catching Himalayan bird

19 Sep 2026
2 min

Himalayan Monal: State Bird of Uttarakhand

The Himalayan monal, a striking landfowl, inhabits the Himalayan mountains across regions such as Jammu and Kashmir, Himachal Pradesh, Uttarakhand, and Sikkim. Although not currently endangered, significant threats to the bird have been highlighted in two studies by researchers from Hemvathi Bahuguna Garhwal University (HBGU).

Key Threats Identified

  • Impact of Climate Change:
    One study investigates how climate change might alter the monal's habitat over time, affecting its seasonal elevation movements essential for breeding and survival.
  • Noise Pollution:
    The second study reveals that increased noise from tourism and traffic is causing the monal to alter its calls, potentially impacting its mating success.

Noise Study Findings

Researchers compared two areas within the Kedarnath Musk Deer Sanctuary: Madmaheshwar Valley (less human activity) and Chopta Valley (more tourists and traffic).

  • Monals in noisier areas used higher-frequency calls.
  • Passive acoustic monitoring was employed to record calls year-round, despite harsh weather conditions.

Significance of Monal Calls

Calls are crucial for the monal's communication, reproduction, and social behavior. Increased noise can hinder these communications, potentially disrupting mating and territorial signaling.

Climate Change Implications

  • The monal's habitat suitability may shift due to changing temperatures and rainfall patterns.
  • Researchers modeled future habitats and noted potential fragmentation, which could restrict the bird's migratory movements.
  • Importance of protecting habitat connectivity is emphasized to enable movement between suitable areas.

Conservation Status

Globally classified as Least Concern on the IUCN Red List, there is a dearth of local population data, necessitating attention to potential local threats.

Recommended Actions

  • Manage human activity to minimize noise in tourist-heavy areas.
  • Ensure connectivity of habitats across altitudinal gradients.
  • Emphasize habitat protection and diversity preservation as the climate changes.

Overall, the studies underline the need for balanced tourism management and habitat conservation to protect the Himalayan monal in the face of environmental changes.

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Passive Acoustic Monitoring

A technique used to record and analyze sounds in an environment. In this context, it was employed to study the vocalizations of the Himalayan monal and how they are affected by noise pollution.

Kedarnath Musk Deer Sanctuary

A wildlife sanctuary in Uttarakhand, India, established to protect the critically endangered musk deer. The Himalayan monal's habitat within this sanctuary, particularly the Madmaheshwar and Chopta valleys, was studied for the impact of human activity.

IUCN Red List

The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a comprehensive inventory of the global conservation status of biological species. 'Critically Endangered' is the highest risk category, indicating a very high probability of extinction in the wild.

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