️
Open main menu
Bird Guide
Standout Species
Search for
Log in
Birdfact+
Light
Dark
System
Bird Behavior
View All Bird Behavior
Communication
Feeding Behaviors
Mating and Breeding
Migration
Social Structures
Learning and Intelligence
Sleeping Habits and Behavior
Bathing & Preening
Human Interaction
Anatomy & Physiology
View All Anatomy & Physiology
Beaks and Skulls
Eyes and Vision
Wings and Flight
Legs and Feet
Digestive System
Respiratory System
Circulatory System
Reproductive System
Nervous System
Integumentary System
Endocrine and Hormonal Regulation
Habitats & Biodiversity
View All Habitats & Biodiversity
Types of Bird Habitats
Articles
About Birdfact
Bird Guide
Standout Species
Birds by family
Bird Behavior
Overview
Communication
Overview
Calls and Songs
Dialects in Bird Songs
Plumage and Coloring
Displays and Postures
Feeding Behaviors
Overview
Foraging Techniques
Diets Across Species
Tool Use in Feeding
Cooperative Feeding
Mating and Breeding
Overview
Courtship Displays
Nesting Habits
Egg Laying and Incubation
Parental Care
Migration
Overview
Types of Migration
Navigational Techniques
Migratory Routes and Patterns
Migration Challenges and Conservation
Social Structures
Overview
Flocking Behavior
Territorial Behavior
Dominance Hierarchies
Cooperative Breeding and Communities
Learning and Intelligence
Overview
Problem-solving Abilities
Imitation and Learning
Memory and Cognition
Sleeping Habits and Behavior
Overview
The Mystery of Unihemispheric Slow-Wave Sleep (USWS) in Birds
Nocturnal Birds and Their Sleep Patterns
Migratory Birds and Sleep: How They Manage Long Journeys
The Role of Melatonin in Bird Sleep Cycles
Bathing & Preening
Overview
Bathing Behaviors
Preening Behaviors
Tools and Adaptations
Human Influence and Intervention
Human Interaction
Overview
Urban Birds
Bird Feeding: Do's and Don'ts
Anatomy and Physiology
Overview
Beaks and Skulls
Overview
Beak Shapes and Function
The Evolution of Bird Beaks
Skull Structure and Adaptations
Eyes and Vision
Overview
Avian Eye Structure
Vision: Adaptations and Capabilities
Importance of Color Vision in Birds
Vision in Action: Avian Adaptations Across Environments
Wings and Flight
Overview
Wing Shapes and Flight Styles
Flight Feathers: Structure and Maintenance
The Mechanics of Flight
Bird Wing Anatomy
Legs and Feet
Overview
Adaptations of Legs and Feet of Birds
Different Types of Bird Feet and their Functions
Locomotion: Walking, Hopping, and Swimming
Talons, Tarsi, and Toes: Understanding Bird Leg Anatomy
Digestive System
Overview
The Digestive System of Birds: An In-Depth Look
Adaptations for Different Diets of Birds
The Role of Gizzards in Bird Digestion
Anatomy of the Bird Digestive Tract
Respiratory System
Overview
The Unique Respiratory System of Birds
Birds' Adaptations for High-Altitude Flight
Respiratory Muscles and Breathing Mechanics of Birds
Air Sac System of Birds
Circulatory System
Overview
The Avian Heart and Circulatory System
Temperature Regulation in Birds
Blood and Immune System of Birds
Reproductive System
Overview
Bird Reproductive Organs
Breeding Season Physiology of Birds
Hormonal Control of Reproduction in Birds
Nervous System
Overview
The Avian Brain: Structure and Functions
Sensory Perception in Birds
Communication between Nervous and Muscular System
Bird Brains: Debunking the Myths
Integumentary System
Overview
Feather Types and Functions of Birds
Skin, Scales, and Other Integuments of Birds
Molting in Birds: Process and Purpose
Endocrine and Hormonal Regulation
Overview
The Role of Hormones in Bird Behavior and Physiology
Seasonal Changes in Birds: Molting, Migration, and Reproduction
Stress Responses and Adaptability: How Birds Cope
Habitats and Biodiversity
Overview
Types of Bird Habitats
Articles
About
Contact
Log in
Birdfact
Plus
Theme
Light
✓
Dark
✓
System
✓
Back
Back
Search for
A-Z of Birds in Bulgaria
Browse our growing list of species guides in Bulgaria to learn all about birds.
Mediterranean Gull
Least Concern
Merlin
Least Concern
Mistle Thrush
Least Concern
Montagu's Harrier
Least Concern
Moorhen
Least Concern
Moustached Warbler
Least Concern
Mute Swan
Least Concern
Nightingale
Least Concern
Nightjar
Least Concern
Northern Gannet
Least Concern
Northern Goshawk
Least Concern
Northern Lapwing
Near Threatened
Northern Pintail
Least Concern
Northern Shoveler
Least Concern
Osprey
Least Concern
Pallid Swift
Least Concern
Pectoral Sandpiper
Least Concern
Peregrine Falcon
Least Concern
Pochard
Vulnerable
Pomarine Jaeger
Least Concern
Purple Heron
Least Concern
Mediterranean Gull
Least Concern
Merlin
Least Concern
Mistle Thrush
Least Concern
Montagu's Harrier
Least Concern
Moorhen
Least Concern
Moustached Warbler
Least Concern
Mute Swan
Least Concern
Nightingale
Least Concern
Nightjar
Least Concern
Northern Gannet
Least Concern
Northern Goshawk
Least Concern
Northern Lapwing
Near Threatened
Northern Pintail
Least Concern
Northern Shoveler
Least Concern
Osprey
Least Concern
Pallid Swift
Least Concern
Pectoral Sandpiper
Least Concern
Peregrine Falcon
Least Concern
Pochard
Vulnerable
Pomarine Jaeger
Least Concern
Purple Heron
Least Concern
Showing 169-189 of 264 birds
←
8
9
10
→
Options
Show 21 per page
Show 42 per page
Show 84 per page
Go to page
Go
