Unveiling the Crisis: Insights from 16 Years of Road Counts

The recent study titled 'Road counts expose widespread declines in South African raptors underestimated by atlas data' has sent shockwaves through conservation circles. Led by researchers from the University of Cape Town's FitzPatrick Institute of African Ornithology and the Endangered Wildlife Trust, this comprehensive analysis draws on an extraordinary dataset: nearly 400,000 kilometers of road transects driven by fieldworker Ronelle Visagie between 2009 and 2025 across central South Africa, spanning provinces like the Free State, Gauteng, Northern Cape, North West, and Mpumalanga. These counts standardized observations per 100 kilometers, providing a robust measure of relative abundance for 18 raptor species and eight large terrestrial birds, totaling 26 species.

What makes this Birds of Prey (BoP) road count methodology particularly powerful is its consistency. Conducted by a single observer under similar conditions—typically early mornings or late afternoons when raptors are active—it minimizes biases common in citizen science efforts. The result? A clear picture of population trajectories that other methods, like the Southern African Bird Atlas Project 2 (SABAP2), have apparently missed.

Alarming Trends: Half of Species in Steep Decline

Of the 26 species assessed, 13—exactly 50%—showed significant declines over the 16-year period. Shockingly, eight of these experienced drops exceeding 50%, with the Endangered Secretarybird (Sagittarius serpentarius) plummeting by 68%. Other heavily impacted raptors include the Jackal Buzzard (Buteo rufofuscus), Verreaux’s Eagle (Aquila verreauxii), Black-winged Kite (Elanus caeruleus), and Southern Pale Chanting Goshawk (Melierax canorus). Even migratory species weren't spared: all three studied—Lesser Kestrel (Falco naumanni), Amur Falcon (Falco amurensis), and Steppe Buzzard (Buteo buteo vulpinus)—registered significant decreases, aligning with trends on their Eurasian breeding grounds.

In contrast, only three species bucked the trend with significant increases: the White-backed Vulture (Gyps africanus)—a critically endangered scavenger showing recovery signals in this area—the Greater Kestrel (Falco rupicolus), and the White-necked Raven (Corvus albicollis). The remaining 10 species exhibited no clear change, but the overall pattern screams urgency for South Africa's apex aerial predators.

Why Road Counts Trump Atlas Data

SABAP2, a cornerstone of African ornithology, relies on volunteer checklists from 5km x 5km grid cells, excelling at distribution but faltering on abundance for wide-ranging raptors. Road counts, by contrast, sample consistently across vast landscapes, capturing real density shifts. The study found agreement on only half the trends; for instance, SABAP2 reported increases for declining species like the Secretarybird and Blue Crane (Anthropoides paradiseus). This discrepancy underscores the need for complementary monitoring tools.

Larger raptors suffered steeper drops, especially outside protected areas, highlighting vulnerability to anthropogenic pressures. This validates road counts as an 'early warning system' for conservation.

Root Causes: A Perfect Storm of Threats

South Africa's raptors face a multi-front assault. Poisoning—both intentional (for pest control or poacher baits) and secondary (scavenging poisoned carcasses)—tops the list, wiping out non-target species en masse. Power infrastructure electrocutions claim thousands annually; retrofitted poles with insulators have helped vultures, but many lines remain deadly.Raptor electrocution studies document at least 14 diurnal raptor species affected in South Africa.

Collisions with power lines and wind turbines fragment aerial highways. Habitat loss from agriculture, urbanization, and bush encroachment shrinks hunting grounds, while climate change alters prey availability. Farmer-raptor conflicts lead to illegal shootings, perceiving them as livestock threats despite evidence to the contrary.

• Poisoning: Kills thousands, including via wildlife crime baits.
• Electrocution: Up to 67 Cape Vultures/year in some areas.
• Habitat degradation: Grasslands converted at alarming rates.
• Collisions: Rising with energy infrastructure boom.

The Vital Role of Raptors in Ecosystems

Birds of prey are nature's pest controllers, regulating rodent and insect populations that damage crops and spread disease. Scavengers like vultures prevent disease outbreaks by cleaning carcasses. Their decline cascades: exploding prey populations strain agriculture, while unchecked scavengers foster pathogens. As bioindicators, raptors signal broader biodiversity health.

University-Led Research Driving Change

The University of Cape Town's FitzPatrick Institute spearheads raptor science, collaborating with the Endangered Wildlife Trust's Birds of Prey Programme. Arjun Amar, senior author, emphasizes multi-method monitoring. UCT offers postdocs in quantitative raptor biology and supports grants like the African Raptor Leadership Grant 2026, fostering African researchers. Ronelle Visagie's fieldwork exemplifies dedicated scholarship turning roads into research corridors.

Conservation Successes and Ongoing Efforts

Positives exist: White-backed Vulture increases stem from anti-poisoning and safe roosting initiatives. EWT's Wildlife & Energy Programme mitigates infrastructure risks via pole audits. Peregrine Fund's campaign pushes continent-wide action.African Raptor Decline Campaign Broader strategies include lead-free ammo promotion and protected corridors.

Path Forward: Urgent Calls to Action

Researchers urge IUCN reassessments for steep decliners, transboundary migrant protections, and expanded monitoring. Policymakers must enforce poisoning bans and mandate raptor-safe infrastructure. Universities like UCT are pivotal, training future leaders via grants and projects. Public engagement—reporting sightings via SABAP or eBird—amplifies impact. With concerted effort, South Africa's skies can reclaim their raptors.

The full study is available here.

Photo by Jesús Vidal on Unsplash