Northern Bald Ibis

About

The Northern Bald Ibis is a large, migratory, critically endangered wading bird with a distinctive featherless, reddish-pink head and a long, decurved red bill. It is known for its glossy black plumage with iridescent green and purple sheens, particularly on the wings. Historically widespread, its population has drastically declined, making it one of the rarest birds globally.

Size & lifespan

Length

70-80 cm

Wingspan

125-135 cm

Weight

1.0-1.5 kg

Lifespan

10-15 years in the wild, up to 25 years in captivity

Diet

Carnivore/Insectivore

Physical characteristics

Plumage

Adults have glossy black plumage with metallic green, bronze, and purple iridescence, especially on the wings and back. The flight feathers are duller black. The neck has a shaggy ruff of elongated feathers.

Beak shape

Long, slender, strongly decurved (downcurved) bill, bright red in adults.

Eye color

Dark brown.

Leg color

Reddish-pink to dull red.

Distinguishing features

Unmistakable featherless, reddish-pink head and face, contrasting sharply with the dark, iridescent body plumage. The long, decurved red bill is also a key feature. A shaggy ruff of feathers around the neck is prominent.

Juvenile appearance

Juveniles have a feathered head and neck, covered in dull greyish-brown down, which gradually recedes to expose the bare skin as they mature. Their bill is duller, and legs are greyish-pink. Plumage is less iridescent than adults.

Seasonal changes

No significant seasonal plumage changes. The intensity of the bare skin coloration on the head and bill may become more vibrant during the breeding season.

Sexual dimorphism

Males and females are generally similar in appearance, though males tend to be slightly larger.

How to identify

1. 1

   Bare Head and Bill

   Look for the distinctive featherless, reddish-pink head and face, and the long, decurved red bill. This is the most striking and unique feature.

2. 2

   Plumage Coloration

   Observe the glossy black body plumage with iridescent green, bronze, and purple sheens, especially visible in good light on the wings and back.

3. 3

   Flight Profile

   In flight, note the outstretched neck and trailing legs, and the powerful, direct wing beats. They often soar on thermals.

4. 4

   Habitat

   Search in arid, rocky, cliff-dominated landscapes, particularly near open foraging areas like steppes or agricultural fields.

5. 5

   Social Behavior

   Look for them in colonies on cliff faces or foraging in groups in open areas.

Habitat & range

Biomes

Arid and semi-arid rocky landscapes, steppes, grasslands, and agricultural fields.

Geographic range

Historically, it ranged across North Africa, the Middle East, and parts of Europe. Today, wild populations are restricted to Morocco (resident) and a small, critically endangered migratory population in Turkey (reintroduced, with wintering grounds in Ethiopia/Yemen). Reintroduction projects are underway in Europe (e.g., Austria, Spain).

Elevation range

Typically found from sea level up to 2,700 meters, often nesting on cliffs in mountainous or hilly terrain.

Preferred environments

Steep, inaccessible cliffs for nesting and roosting, adjacent to open, short-grass steppes, fallow fields, or semi-arid pastures for foraging. Requires access to water sources.

Behavior

Activity time

Diurnal, active during daylight hours for foraging and social interactions.

Feeding habits

Forages by probing its long, decurved bill into soft soil, mud, and crevices. Diet consists primarily of insects (e.g., grasshoppers, beetles, crickets), larvae, worms, snails, small reptiles (lizards, snakes), amphibians, and occasionally small mammals or bird eggs. Often forages in groups.

Social behavior

Highly colonial, nesting and roosting in large groups on cliff faces. Forages in flocks, especially outside the breeding season. Exhibits strong social bonds within colonies.

Flight pattern

Strong, direct flight with powerful, deep wing beats. Often soars on thermals, especially during migration. Flies with neck outstretched and legs trailing behind.

Migration pattern

The Moroccan population is largely resident, with some local movements. The reintroduced Turkish population is migratory, traveling south to wintering grounds in the Ethiopian highlands or Yemen. European reintroduced populations are also migratory, with established routes to wintering grounds in southern Spain (Andalusia).

Territoriality

Colonial nesters, but pairs defend a small territory immediately around their nest site on the cliff ledge. Foraging grounds are generally shared.

Breeding & reproduction

Breeding season

Typically begins in February-March in Morocco, and slightly later (March-April) in more northern populations.

Nesting habits

Nests colonially on inaccessible ledges and crevices of steep, rocky cliffs, often overlooking rivers or valleys. Nests are bulky platforms made of sticks, twigs, and grass, lined with softer material.

Clutch size

2-4 eggs, most commonly 2-3.

Egg description

Typically 2-4 eggs, pale blue or greenish-white, often speckled or blotched with reddish-brown or purplish markings. Oval-shaped.

Incubation period

24-28 days, incubated by both parents.

Fledging period

45-50 days after hatching. Young remain dependent on parents for several weeks after fledging.

Parental care

Both parents share incubation duties and care for the chicks, bringing them food and protecting them until they fledge and become independent.

Where to find

Field tips

1. Visit known breeding colonies. The most reliable way to see them is to visit established breeding colonies, such as those in Souss-Massa National Park in Morocco, or the reintroduction sites in Austria or Spain.
2. Look for foraging flocks. Outside the breeding season, or during foraging trips, look for groups of ibises probing in short-grass fields, fallow land, or along riverbanks.
3. Scan cliff faces. When in suitable habitat, use binoculars or a scope to scan inaccessible cliff ledges for roosting or nesting birds.
4. Observe flight patterns. Their distinctive flight profile and tendency to soar can make them visible from a distance.
5. Consult local guides/conservationists. Given their rarity and specific habitat requirements, local guides or conservation project staff can provide the most up-to-date information on their whereabouts.

Quick facts

Conservation Status:

Critically Endangered

Distinctive Feature:

Bare, reddish-pink head and decurved red bill

Nesting:

Colonial on steep cliffs

Diet:

Insects, worms, small vertebrates

Social Behavior:

Highly colonial

Fun facts

• The Northern Bald Ibis was once revered in ancient Egypt and is depicted in hieroglyphs, often associated with the god Thoth.
• It is one of the few migratory bird species whose migration routes are taught to young birds by human foster parents using ultralight aircraft in some reintroduction projects.
• Despite its name, it is not truly 'bald' but has very fine, sparse feathers on its head that are not visible from a distance, giving it a bare appearance.
• The species was thought to be extinct in Europe for over 300 years until reintroduction efforts began in the early 21st century.
• Its scientific name 'Geronticus eremita' translates to 'old hermit', referring to its bare head and preference for remote, rocky habitats.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Pelecaniformes

Family

Threskiornithidae

Genus

Geronticus

Species

Geronticus eremita

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