Wazzup Pilipinas!? .
The skyline of Metro Manila is changing. High above the gridlock of EDSA and the bustling markets of Makati, a new, agile resident is claiming the canopy. To the casual observer, they are "cute" and "Instagrammable"—tiny, bushy-tailed acrobats leaping across power lines. But to the Department of Environment and Natural Resources (DENR), they are a biological time bomb.
The Finlayson’s squirrel (Callosciurus finlaysonii), a non-native species from the forests of Thailand and Myanmar, has officially established a foothold in the heart of the Philippines’ urban jungle. What started as a single "liberated" pet has transformed into a growing invasive population that threatens local biodiversity, urban infrastructure, and even public health.
The "Pet" That Became a Problem
The origins of this infestation are as dramatic as a screenplay. Investigation by the DENR reveals that the species was introduced by a foreigner who kept the squirrel as a pet. In a misguided act of "mercy," the animal was released into the wild.
Without natural predators to keep their numbers in check, these "variable squirrels"—named for their shifting coat colors from charcoal black to reddish-brown—have multiplied rapidly. They have now been documented across seven key barangays in Makati:
Forbes Park & Dasmariñas
Bel-Air & San Lorenzo
Urdaneta & Magallanes
Pinagkaisahan
A Threat to the Grid and the Garden
In the high-stakes world of urban living, these squirrels are more than just a nuisance; they are a liability. Residents in Makati have reported frequent damage to telecommunication and power lines. Like all rodents, squirrels must constantly gnaw to keep their teeth from overgrowing, and the rubberized coating of Manila's electrical grid provides the perfect whetstone.
Environmentally, the stakes are even higher. Chief of the DENR-BMB Wildlife Resources Division, Anson Tagtag, warns that these squirrels are aggressive foragers. They don't just eat nuts; they are known to:
Prey on bird eggs, threatening urban bird populations.
Devastate fruit-bearing trees, competing directly with native species.
Outcompete local wildlife for nesting sites and territory.
The Silent Danger: Pathogens and Parasites
Beyond the physical damage, the DENR is sounding the alarm on health risks. Wild animals, especially invasive ones, are often vectors for zoonotic diseases. The Finlayson’s squirrel can carry:
Leptospirosis: Transmitted through urine in soil or water.
Salmonellosis: Spread through droppings on surfaces.
Parasites: Ticks and fleas that can migrate to household pets and humans.
Native vs. Invasive: Know the Difference
While the sight of a squirrel might feel novel in the city, the Philippines is actually home to nine native squirrel species. However, these are endemic to islands like Palawan, Siargao, Bohol, and Leyte. The Philippine tree squirrel is a national treasure, but it belongs in its natural forest habitat—not dodging jeepneys in Metro Manila.
The Verdict: Don't Feed the "Cuteness"
The DENR’s message is clear: Do not feed or encourage these animals. While they may look like characters from a storybook, their presence is an "alarming" ecological disruption.
As they continue to leap across the power lines of Makati, they serve as a furry reminder of the dangers of releasing exotic pets into the wild. In the delicate balance of the Philippine ecosystem, even the smallest invader can cast a long, dark shadow.
Ross is known as the Pambansang Blogger ng Pilipinas - An Information and Communication Technology (ICT) Professional by profession and a Social Media Evangelist by heart.
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