Birds of Prey You Can See While Hiking Khao Phra Thaeo National Park

Khao Phra Thaeo National Park shelters the largest remaining tract of primary rainforest on Phuket, a wet green ridge rising above the busy west coast resorts. For hikers, the appeal is twofold: gibbons calling from the canopy, dramatic waterfalls such as Ton Sai and Bang Pae, and a forest interior that quietly hosts one of the richest raptor communities in southern Thailand. The combination of closed canopy, broad river valleys, mangrove fringe and open country around the Bang Pae reservoir creates a layered hunting ground that few other parks on the island can match.

Travellers arriving from Sydney or Melbourne on a direct overnight service to Phuket International often step off the plane already thinking about Pacific Golden Plovers on the mudflats. Within a single morning inside the park, however, they can swap mental images of Wedge-tailed Eagles soaring over the Red Centre for the haunting calls of Crested Serpent Eagles drifting through the dipterocarp. The birding density here is high, the trails are manageable, and the rewards tend to arrive before the heat of the day sets in.

Why Khao Phra Thaeo is a raptor hotspot

Khao Phra Thaeo sits at the intersection of three very different habitats. Steep rainforest slopes climb toward the 529-metre summit of the park's namesake peak, while at its base mangrove channels thread into the Bang Pae estuary and the open reservoir with surrounding grassland offers the kind of edge habitat that hawks and harriers favour. This juxtaposition, compressed into just over 21 square kilometres, is the structural reason raptors thrive here.

The ridge also functions as a soft migratory funnel. Oriental Honey Buzzards, Japanese Sparrowhawks and small numbers of Black Kites follow the Thai–Malay Peninsula twice a year, often drifting along the forested spine of Phuket before pushing south to Peninsular Malaysia and beyond. A steady current of birds passes overhead during the right window, and patient observers at the higher viewpoints are sometimes rewarded with kettles of dozens of raptors spiralling above the canopy. Together, these features place the park firmly among the top birding locations in the region.

The Crested Serpent Eagle, a resident sentinel

No other bird announces itself so clearly along the forest trails. The Crested Serpent Eagle is a mid-sized raptor with a striking white-barred underwing, a small but obvious crest, and bright yellow legs. Its call — a penetrating, drawn-out whistle that rises in pitch — is often the first cue that something is circling overhead, well before the silhouette resolves against the bright sky.

This species specialises in reptiles, dropping onto sun-warmed patches of forest floor to snatch lizards and snakes. Around the Bang Pae and Ton Sai trails, where logs lie partly open in filtered light, it is genuinely common. Australian birders familiar with the distant silhouette of a Wedge-tailed Eagle will recognise the same lazy, circling flight profile, though the serpent eagle is far more vocal and far more often seen from the trail itself. A short pre-dawn start, when the calls of White-crested Laughingthrushes and Abbott's Babblers rise from the understorey, is often the most productive window for hearing one before seeing it.

The Changeable Hawk Eagle, a forest phantom

More secretive and considerably more sought-after is the Changeable Hawk Eagle, a powerful accipiter that can appear in either pale or dark morphs. Pale birds are ghostly white below with bold black wingtips, easily mistaken for a small vulture at long range. Dark birds are a deep slaty brown with subtle barring on the tail. Either way, the species is built for the inside of the forest, with short, rounded wings and a long tail that allow it to weave between trunks at speed.

Inside Khao Phra Thaeo, Changeable Hawk Eagles tend to hunt along the forest edge, perching quietly for long spells before launching into a sudden pursuit of a squirrel, large bird or monitor lizard. They are most reliably seen around the lower stretches of the Ton Sai waterfall trail and along the road that climbs toward the park headquarters. Birders used to scanning the open skies of central Australia for Brown Falcons and Little Eagles will find the experience very different here: the hawk eagle is a bird you encounter around bends in the trail rather than along the horizon.

The Oriental Honey Buzzard, a seasonal wanderer

The Oriental Honey Buzzard is the raptor that brings most Australian visitors to Phuket in spring and autumn. This slender, long-winged buzzard feeds almost exclusively on the larvae and combs of social wasps and bees, and it migrates between eastern Asia and the Indonesian archipelago in significant numbers. Phuket sits squarely on its path, and Khao Phra Thaeo's forested ridges funnel the birds low enough to study in detail.

Individuals are strikingly variable. Males often show a dark grey head and a white-tipped black tail, while females are brown with a dark eye stripe running back through a yellow face. Migrating flocks in March and April, and again in September and October, can include dozens of birds drifting north or south depending on the season. Timing matters: checking the tour calendar before booking helps match a Phuket trip with one of these passage windows, when a few hours at the higher viewpoints can produce more raptors than an entire winter spent around the southern trails.

Kites and sea eagles above the wetlands

The lower edges of the park, where mangrove gives way to the Bang Pae reservoir and the open water of the estuary, host a very different cast of raptors. Brahminy Kites are almost guaranteed here, their warm chestnut plumage and pale head unmistakable as they wheel above the brackish channels. White-bellied Sea Eagles are less common but more dramatic, with a wingspan that can exceed two metres and a flight profile that Australian birders regularly compare with their own White-bellied Sea Eagle, a species seen along the east and north coasts from Sydney northwards.

Black Kites appear in smaller numbers, usually during migration, while small flocks of Peregrine Falcons occasionally hunt the waders and terns around the coast. A scope pointed over the reservoir at mid-morning often reveals a kite perched in the top of a Casuarina, scanning the water below for surface-feeding fish. It is one of the easiest ways to add a second raptor species within the same hour of birding and a useful contrast to the forest birds higher up the slope.

Practical tips for travellers from Australia

Reaching Phuket is straightforward. Direct overnight flights from Melbourne and seasonal services from Sydney are available through Qantas, Jetstar, Virgin Australia and several Thai carriers, with fares from Australia commonly ranging from roughly AUD 700 to AUD 1,200 return during shoulder periods. Travellers should be aware of Australia's strict biosecurity rules under the Environment Protection and Biodiversity Conservation Act 1999, which extend to footwear, hiking gear and even soil on boots: cleaning all field equipment thoroughly before returning home is essential to avoid fines at the airport.

Conditions on the ground are warm and humid year-round. The dry season from December to March is the most comfortable for longer walks, while the early monsoon months bring both rain and a flush of insect activity that draws more raptors to feeding areas. Lightweight binoculars, a rain jacket, a head torch for early starts, and a slow pace will carry most visitors comfortably through a full circuit. Booking a guided outing through South Thailand Birding Tours ensures that local permits, leech socks in the wet months and access to restricted trails are all arranged in advance.

Birding ethically in a fragile forest

Khao Phra Thaeo is also the last refuge of the Phuket Gibbon, a subspecies of Lar Gibbon, and the wider forest has been the focus of long-running conservation work. Raptors here are a sign of ecosystem health, and the way birders behave on the trails shapes whether that health continues. Keeping a respectful distance, never playing recordings near a perched eagle, packing out any litter, and sticking to marked paths all reduce disturbance to the canopy raptors and the gibbons that share the same branches.

Australian birders carry a strong tradition of careful, record-driven observation, much of it organised through BirdLife Australia and eBird Australia. Logging every raptor seen inside Khao Phra Thaeo contributes to citizen science datasets that help track migration timing and species range shifts across the Thai–Malay Peninsula. With that habit in mind, the trail becomes more than a checklist exercise; it becomes a small contribution to the long-term picture of these birds.

The Crested Serpent Eagle drifting over Ton Sai at dawn, the sudden burst of a Changeable Hawk Eagle along the forest edge, the steady procession of Oriental Honey Buzzards in late March — these are the images that stay with visitors long after the return flight to Sydney or Melbourne. With careful planning, reasonable fitness and a quiet respect for the forest, almost any hiker can leave Khao Phra Thaeo with a notebook full of raptors and a sharper sense of how thin, and how precious, the rainforest of southern Thailand really is.