{ "slug": "crocodile-attack", "question": "What are the odds of a fatal crocodile or alligator attack?", "category": "animal", "no_reliable_estimate": false, "perceived": { "description": "Crocodilians occupy a specific corner of the public fear landscape — vivid enough to be taken seriously, yet mentally filed under \"exotic hazard\" that applies only to people on wildlife documentaries or Australian tourists who ignore warning signs. The animals responsible for the largest number of large-predator human fatalities globally are not bears, sharks, or mountain lions; they are Nile and saltwater crocodiles, and most of their victims are subsistence farmers and fishers in Africa and Southeast Asia whose deaths rarely appear in international news.\n", "rough_estimate": "most people in temperate countries would guess crocodile deaths are in the same range as shark deaths — a few dozen worldwide per year", "kind": "intuition" }, "native": { "display": "~1,000 deaths per year globally (CrocAttack database documented rate + significant underreporting)", "numerator": 1000, "denominator": 5000000000, "unit": "per year", "population": "global adults" }, "normalized": { "lifetime_us_adult": 0.0000118, "display": "1 in ~84,700 lifetime (global adult)", "log_value": -4.93, "assumptions": "The CrocAttack database (formerly CrocBITE, the world's most comprehensive open-source crocodilian attack database) recorded 5,614 documented attacks between 2015 and 2024, of which 2,873 were fatal — averaging ~287 documented fatal attacks per year. The database itself acknowledges that reporting is \"virtually non-existent\" in parts of the Nile crocodile's sub-Saharan range and that only a small fraction of actual attacks are recorded in many countries. Expert estimates incorporating underreporting put global fatalities at approximately 1,000 per year. Annual rate: 1,000 / 5,000,000,000 = 2.0 × 10⁻⁷. Compounded over 59 years: 1 − (1 − 2.0e-7)^59 ≈ 1.18 × 10⁻⁵, i.e. roughly 1 in 84,700. Uncertainty reflects the documented-only lower bound (~287/year → 5.7e-6 lifetime) and a higher underreporting scenario (~2,000/year → 2.35e-5 lifetime).\n", "uncertainty": { "low": 0.0000057, "high": 0.0000235 }, "scope": "global_adult_lifetime" }, "sources": [ { "url": "https://crocattack.org/crocodilian-attack-statistics/", "title": "Crocodilian Attack Statistics", "publisher": "CrocAttack — Worldwide Crocodilian Attack Database", "source_type": "reputable_reference", "statistic": "5,614 documented attacks 2015–2024, 2,873 fatal; ~561 attacks and ~287 deaths per year documented; experts estimate ~1,000 deaths/year including unreported", "excerpt": "\"There were 5,614 documented attacks between 2015 and 2024, resulting in 2,873 fatalities, averaging about 561 reported attacks and 287 deaths per year as of 2024. Including unreported incidents, particularly in Africa and Asia, experts estimate global fatalities at approximately 1,000 annually.\"\n", "source_date": "2025-09-30", "source_accessed": "2026-04-24", "archive_url": "http://web.archive.org/web/20260416162557/https://crocattack.org/crocodilian-attack-statistics/", "calculation_notes": "CrocAttack documents 287 fatal attacks/year. With expert-estimated underreporting correction to ~1,000/year: 1,000 / 5,000,000,000 = 2.0e-7 annual rate. Compounded over 59 years: 1 - (1 - 2.0e-7)^59 ≈ 1.18e-5, or ~1 in 84,700. The documented-only figure (287/year) gives a lower-bound lifetime probability of ~3.4e-6, used as the basis for uncertainty.low.\n", "independence_note": "CrocAttack draws from media surveillance, field reports, and national wildlife agency data across multiple countries, independently of any single government reporting pipeline.\n" }, { "url": "https://www.iucncsg.org/pages/Crocodilian-Attacks.html", "title": "Crocodilian Attacks", "publisher": "IUCN Crocodile Specialist Group", "source_type": "reputable_reference", "statistic": "Saltwater crocodile leads in total attacks (1,350 vs 1,005 for Nile, 2010–2020); Nile crocodile has a higher fatality rate (696 vs 668 fatal); underreporting likely significant", "excerpt": "CrocBITE data for total attacks by species for the period 2010–2020 show the saltwater crocodile (C. porosus) with 1,350 total attacks (668 fatal) and the Nile crocodile (C. niloticus) with 1,005 total attacks (696 fatal). \"The incidence of crocodilian attacks on humans in many countries is challenging to quantify. It is likely that many more people are attacked than is reported, as many attacks occur in remote areas.\"\n", "source_date": "2023-01-01", "source_accessed": "2026-04-24", "archive_url": "http://web.archive.org/web/20260403160543/https://www.iucncsg.org/pages/Crocodilian-Attacks.html", "calculation_notes": "The IUCN CSG's CrocBITE data (2010–2020) shows 1,350 saltwater crocodile attacks (668 fatal) and 1,005 Nile crocodile attacks (696 fatal). The qualitative assessment of underreporting corroborates the CrocAttack database's own caveat and supports the expert estimate of ~1,000 deaths/year as the appropriate central figure rather than the documented 287.\n", "independence_note": "IUCN CSG is an independent scientific specialist group operating under the IUCN Species Survival Commission; its attack data is collected separately from the CrocAttack media-surveillance database.\n" } ], "comparison_anchors": [ { "label": "Death by shark attack (lifetime, US adult)", "lifetime_us_adult": 1.76e-7 }, { "label": "Death by bear attack (lifetime, US adult)", "lifetime_us_adult": 2.64e-7 }, { "label": "Death by hippo attack (lifetime, global adult)", "lifetime_us_adult": 0.00000177 } ], "regional_breakdown": [ { "region": "Sub-Saharan Africa (resident near Nile crocodile habitat)", "probability": 0.00015, "notes": "Concentrated in Tanzania, Mozambique, Uganda, South Sudan, and DRC; the Nile crocodile's range overlaps heavily with subsistence fishing and river-crossing communities." }, { "region": "Northern Australia / Indonesia / Papua New Guinea (saltwater crocodile range)", "probability": 0.00003, "notes": "Saltwater crocodile is the largest living reptile and highly aggressive; remote communities in coastal and riverine areas face significant risk." }, { "region": "Florida resident (American alligator)", "probability": 2e-7, "notes": "Florida averages ~6 unprovoked alligator bites/year, of which fatalities average <1/year; alligator attacks are rarely fatal compared to Nile or saltwater crocodile encounters." }, { "region": "Resident outside crocodilian range", "probability": 1e-9, "notes": "Captive or zoo incidents only; effectively zero wild encounter risk." } ], "short_label": "Crocodile attack", "myth_framing": "underrated", "outcome_severity": "fatal", "exposure_pattern": "acute", "outcome_type": "death", "valence": "negative", "caveats": "The global average figure is almost entirely irrelevant to the personal risk of a US adult or most Western European adults. Nile and saltwater crocodile fatalities are overwhelmingly concentrated among subsistence communities living and working along African river systems and Southeast Asian coastlines and deltas. Florida alligator attacks average roughly 6 unprovoked bites per year and are rarely fatal — alligators and crocodiles have very different attack profiles. The 1 in ~84,700 lifetime figure applies as a global average; a US adult living far from crocodilian habitat faces a lifetime risk several orders of magnitude lower than this. A fisherman on Lake Victoria or the Rufiji River faces a risk several orders of magnitude higher.\n", "quality_score": { "d1": 3, "d2": 5, "d3": 5, "d4": 4, "d5": 4, "d6": 4, "d7": 3, "d8": 4, "avg": 4, "scored_by": "extracted-from-transcript", "scored_at": "2026-05-03", "methodology_version": "1.0" }, "reviewer": "8d-eval-2026-05-16", "last_reviewed": "2026-05-16", "reviewed": true, "generated_at": "2026-04-24", "image": { "alt": "A stylized crocodile eye and snout emerging from flat water, minimal flat vector illustration in muted olive and grey tones." }, "attribution": "Likelier — https://likelier.app", "license": "https://creativecommons.org/licenses/by-sa/4.0/", "support": "https://buymeacoffee.com/kgluszczyk?via=likelier&utm_content=api-fear-single", "canonical_url": "https://likelier.app/crocodile-attack" }