# Osprey (*Pandion haliaetus*)

> The osprey (Pandion haliaetus) is a fish-specialist raptor with reversible outer toes and spiny foot pads for gripping slippery prey. It nests on coasts, rivers, and lakes nearly worldwide — from the United States and Canada to the UK, Scandinavia, and Australia — and is listed Least Concern after recovering from mid-century pesticide declines.

- **Category:** Bird
- **Conservation status (IUCN):** Least Concern
- **Range:** Nearly worldwide coasts and large inland waters, including the United States, Canada, UK, Scandinavia, and Australia.
- **Canonical page:** https://globalanimalguide.org/animals/osprey/
- **Last reviewed:** 2026-07-16

## Scientific classification

- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Aves
- **Order:** Accipitriformes
- **Family:** Pandionidae
- **Genus:** Pandion

## Facts at a glance

| Attribute | Value |
| --- | --- |
| Scientific name | Pandion haliaetus |
| Diet | Fish |
| Habitat | Coastal bays, rivers, lakes, and reservoirs |
| Lifespan | Around 20 years in the wild (varies by population and captivity). |
| Weight | About 1.6 kg typical adult mass (sex and region vary). |
| Top speed | Up to roughly 80 km/h when moving at speed. |
| Conservation status | Least Concern (IUCN) |

## Built for catching fish

Ospreys are the only living members of the family Pandionidae. Their outer toe can swing backward like an owl's, creating a two-and-two grip, while barbed pads on the soles stop fish from wriggling free. Adults typically weigh about 1.6 kg with a wingspan near 1.5–1.8 m, and they often plunge feet-first from 10–40 m above the water.

## Almost exclusively piscivorous

Roughly 99% of an osprey's diet is live fish — mullet, flounder, trout, perch, and other surface-feeding species depending on region. They take both freshwater and saltwater fish and will travel several kilometres from the nest to productive shallows. Prey is usually carried head-first for aerodynamic flight.

## Cosmopolitan waterside nests

Breeding pairs occupy coastal bays, large lakes, reservoirs, and slow rivers across every continent except Antarctica. In North America and Europe they favour stick nests on channel markers, dead trees, and purpose-built platforms. Northern populations migrate; many Australian and tropical birds stay year-round near good fishing grounds.

## DDT collapse and recovery

Osprey numbers crashed in the 1950s–70s when DDT thinned eggshells and wrecked nesting success in North America and Europe. Bans on organochlorine pesticides, nest platforms, and legal protection drove a strong rebound, and the species is now Least Concern — though local threats still include entanglement in fishing line and disturbance at busy marina nests.

## Frequently asked questions

### Can ospreys eat saltwater fish?

Yes. Ospreys hunt in both fresh and salt water and commonly take coastal species such as mullet and flounder as well as inland trout and perch.

### Why do ospreys dive feet-first?

Their talons and reversible outer toes are specialised for gripping fish; diving feet-first protects the head and lets them snatch prey near the surface without swimming underwater like a cormorant.

### Are ospreys related to eagles?

They are raptors in Accipitriformes but sit in their own family, Pandionidae, separate from true eagles and hawks — a reflection of their extreme fish-hunting specialisation.

### How fast can an osprey fly?

In level flight they often cruise around 40–50 km/h, and stoops toward prey can approach roughly 80 km/h.

### Do ospreys migrate?

Many northern breeders migrate to warmer coasts and inland waters for winter, while some tropical and Australian populations remain resident where fish are available year-round.

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Source: Global Animal Guide (https://globalanimalguide.org/animals/osprey/). Licensed CC BY-NC 4.0 — free for non-commercial reuse with attribution.