OPEN-BILLED STORK
Anastomus oscitans
DESCRIPTION
The Open-billed Stork (Anastomus oscitans) is a large wading bird characterized by its unique bill, which has a distinct gap in the middle, allowing it to efficiently extract snails and other mollusks from their shells. This stork has a predominantly white body with black wing tips and a long neck, giving it an elegant appearance. It is often seen foraging in shallow waters, where it uses its specialized bill to probe mud and water for food, showcasing its adaptability to various wetland habitats.
FUN FACTS
- The Open-billed Stork is known for its unique feeding technique, where it uses its specialized bill to extract snails from their shells, showcasing its adaptation to a specific diet
- Additionally, these storks are often seen in large flocks during migration, creating a stunning visual display as they soar together in the sky
QUICK INFO
Lifespan10-15 years in the wild
Average Weight1.5-2.5 kg
Average Length65-75 cm
Diet TypeOmnivore
Social StructureThey are often found in pairs or small groups, especially during the breeding season when they may form larger colonies.
Activity PatternDiurnal
Breeding SeasonMonsoon season (June-September)
- Habitat
- This species inhabits wetlands, rice fields, and shallow lakes, where it can find ample food sources. It prefers areas with abundant water and vegetation, which provide both foraging opportunities and nesting sites.
- Biomes
- Wetlands, Grasslands
- Native Range
- The Open-billed Stork is native to the Indian subcontinent and parts of Southeast Asia, including countries like India, Bangladesh, Myanmar, and Thailand.
- Continent
- Asia
- Countries
- India, Bangladesh, Myanmar, Thailand, Vietnam, Cambodia, Laos
- Diet
- The Open-billed Stork primarily feeds on snails, but it also consumes other aquatic invertebrates and small fish. Its unique bill structure allows it to easily extract snails from their shells, making them a favored food source.
- Diet Type
- Omnivore
- Favorite Food
- snails
- Social Structure
- They are often found in pairs or small groups, especially during the breeding season when they may form larger colonies.
- Activity Pattern
- Diurnal
- Group Size
- 5-30
- Territorial
- 0
VU
CR
1.5-2.5 kg
Weight
65-75 cm
Length
- Coloration
- Predominantly white with black wing tips and a long neck.
- Lifespan
- 10-15 years in the wild
- Offspring per Birth
- 2-4
- Sexual Maturity
- 3-4 years
- Breeding Season
- Monsoon season (June-September)
LC
Least Concern
IUCN Red List Status
- Population Status
- The population of Open-billed Storks is currently stable, with no immediate threats to their survival.
- Wild Population Estimate
- 50,000-100,000
- Population Trend
- Stable
- Endangered
- 0
- Threats
- Main threats include habitat loss due to wetland drainage and pollution. Additionally, hunting and disturbance from human activities can impact local populations.
- Predators
- Large birds of prey, such as eagles and hawks, as well as crocodiles and large mammals that may prey on eggs or young storks.
- Defense Mechanisms
- They rely on their ability to fly away quickly and their camouflage in wetland environments to avoid predators.
- Compatible Animals
- Other stork species, herons, and ibises
- Found in Zoos
- Uncommon