Viral videos have shifted public opinion about water monitors, long held in contempt in Thai culture, even as rising numbers of the reptiles pose problems for residents

Shortly after dawn, Lumphini Park comes alive. Bangkok residents descend on the sprawling green oasis in the middle of the city, eager to squeeze in a workout before the heat of the day takes hold. Joggers trot along curving paths. Old men struggle under barbells at the outdoor gym. Spandex-clad women stretch into yoga poses on the grass.

Just metres away, one of the park’s more infamous occupants strikes its own lizard pose. About 400 Asian water monitor lizards call Lumphini Park home, and this morning they are out in full force – scrambling up palm trees, swimming through the waterways and wrestling on the road.