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Madagascar flying fox skulls 6% smaller than before 1980s, study finds

By TOI SCIENCE DESK · Via Times of India · Published by Everything Blog

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Researchers examined 121 preserved museum specimens spanning more than 150 years to document skeletal changes in the Malagasy flying fox. The physical decline aligns with the commercialization of bat hunting in the 1980s, when larger bats were targeted for restaurant and market trade. Other factors like deforestation, shifts in fruit availability, and climate conditions may also contribute to the shrinking skull sizes. Consequently, scientists are calling for stronger protections at breeding roosts and continued monitoring of related fruit bat populations.

Key points

Selective commercial hunting of larger animals likely drove morphological shifts in subse…: Selective commercial hunting of larger animals likely drove morphological shifts in subsequent bat generations.
Environmental pressures such as deforestation and climate shifts may also contribute to a…: Environmental pressures such as deforestation and climate shifts may also contribute to altered bat morphology.
Stronger protections around breeding sites are urgently needed to safeguard the essential…: Stronger protections around breeding sites are urgently needed to safeguard the essential seed-dispersing species.

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One of Madagascar’s largest bat species is showing a striking physical change, with researchers finding that its skulls have become approximately 6 per cent smaller over the past four decades. The findings, published in the Journal of Mammalogy on October 29, 2026, point towards a possible connection between shrinking body size and increased hunting pressure. The research, also reported by Science News and conservation-focused publications, raises fresh questions about how human activity is changing wildlife populations and threatening species already facing population decline. The Malagasy flying fox (Pteropus rufus), known for its impressive wingspan and fox-like facial features, is among the world's largest bats. Found across Madagascar, these fruit-eating mammals play an important ecological role by dispersing seeds and helping maintain forest ecosystems. The research was led by Emily Cornelius Ruhs and Steven Goodman of Chicago's Field Museum. To investigate the apparent change, the scientists examined 121 preserved specimens held in nine natural history museums across the United States and Europe. The specimens represented more than 150 years of the species' history.

The team recorded measurements of 12 different features…

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Selective commercial hunting of larger animals likely drove morphological shifts in subse…: Selective commercial hunting of larger animals likely drove morphological shifts in subsequent bat generations.
Environmental pressures such as deforestation and climate shifts may also contribute to a…: Environmental pressures such as deforestation and climate shifts may also contribute to altered bat morphology.
Stronger protections around breeding sites are urgently needed to safeguard the essential…: Stronger protections around breeding sites are urgently needed to safeguard the essential seed-dispersing species.

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Key Points

Selective commercial hunting of larger animals likely drove morphological shifts in subse…: Selective commercial hunting of larger animals likely drove morphological shifts in subsequent bat generations.
Environmental pressures such as deforestation and climate shifts may also contribute to a…: Environmental pressures such as deforestation and climate shifts may also contribute to altered bat morphology.
Stronger protections around breeding sites are urgently needed to safeguard the essential…: Stronger protections around breeding sites are urgently needed to safeguard the essential seed-dispersing species.

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Madagascar flying fox skulls 6% smaller than before 1980s, study finds

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