I had a hard time pronouncing Pinacanauan River. When I first told a friend about it, I simply described the experience as, "Like a scene straight out of a Stephen King novel, where millions of bats flew out of the cave, completely covering the dusk sky with darkness."
Circadian Bat Flights Over the Pinacanauan River
Navigating the Pinacanauan River
Pinacanauan River is a major tributary of the vast Cagayan River, gracefully flowing through the municipality of Peñablanca in Cagayan province. It is located just a few steps away from the famous Callao Cave. Along the ebb and flow of the river, several other distinct cave systems and limestone rock formations can be found.
Though we were tired and restless from the long, grueling overland trip to Tuguegarao, it didn't matter. If you ask me, the trip only becomes better the further north into Luzon we venture, bringing us closer to landscapes I often only see in movies. Imagine a pristine lake where you can ride a wooden boat across calm waters, surrounded by towering, jagged rocky formations with water dripping from the canopy above, creating super-mini waterfalls. The Pinacanauan River was exactly like that, and I felt the magic the moment we stepped into the wooden boat.
Waiting for the Swarm at Dusk
Our boatman and our 11-year-old guide, Andoy (who was once featured in Korina Sanchez's "Rated K"), took us to a quiet rocky islet. There, we rested and waited, staring intently at a dark cave opening situated about 40 feet high on a limestone wall. The mouth of this particular cave is where the circadian flights of over a million bats originate, as they awaken and fly out of their nesting place into the dusk skies over the river to hunt for food.
Some days they don't show up, but most days they do. We were joking that maybe the bats had their own assigned look-outs at the edge of the cave mouth with tiny telescopes, telling the others, "Yo, the tourists are waiting for our circadian flight. Should we stay inside, or should we go out and give them a show?"
The Grand Circadian Flight
Fortunately, despite our bat humor, they proceeded to pour out of their cave right around 5:45 p.m. As thousands upon thousands of them flew out, a thick, swirling line of black ink completely covered a portion of the sky. It went on and on until they formed a hurricane-like funnel, whirling rapidly out of their cave and into the beautiful evening sky, which was slowly transitioning from deep red to dark gray. With wings furiously flapping and high-pitched bat cries enveloping the air, the eerie atmosphere strongly reminded me of a classic Stephen King novel setting.
The entire spectacle lasted for about 5 to 7 intense minutes. And just as quickly as the bats had flown out, the last sweeping shadow of dusk took its final bite, covering the landscape in total darkness. We then boarded our boat to head back, utterly delighted and humbled by the wonderful, untamed scenes of nature we had just witnessed.
The Pinacanauan River bat viewing area is just a few steps from Callao Cave. The entire Callao Cave complex is easily accessible via a 15-kilometer scenic tricycle ride from the main center of Tuguegarao City, Cagayan.
Planning your own expedition to Northern Luzon? Check out our complete Cagayan Travel Guide: Nature Spots & Itineraries for top attractions, transport tips, and historical highlights.
