BREEDING BIOLOGY
..BREEDING HABITAT and
.. .. .. NEST LOCATION
..... Habitat Selection
..... Bird Communities and
..... ..... Competition
..... Coloniality
..... Site Tenacity

..ONSET OF NESTING
..... Breeding Season
..... Copulation

. NEST STRUCTURE and
.. .. .. PLACEMENT
..... Masterbuilders
..... Nest Lining
..... Nest Materials
..... Feathered Nests
..... Nest Sanitation

. BROOD PARASITISM
.. ....(Laying eggs in the nests of others)
..... Brood Parasitism
..... Cowbirds
..... Parasitized Ducks
..... Parasitic Swallows

. MATING SYSTEMS
..... Monogamy
..... Polygyny
..... Polyandry
..... Polyandry and the Spotted
..... ..... Sandpiper
..... Cooperative Breeding
..... Promiscuity

. EGGS, CLUTCHES and BROODS
..... Eggs and Their Evolution
..... Average Clutch Size
..... Variation in Clutch Sizes
..... Color of Eggs
..... Hatching Asynchrony and
..... ..... Brood Reduction

. INCUBATION
..... Incubation Time
..... Incubation: Heating Eggs
..... Who Incubates?
..... Brood Patches

. NESTLINGS and FLEDGLINGS
..... Precocial and Altricial Young
..... Parental Care
..... Bird Milk
..... Transporting Young
..... Eye Color and Development
..... Gull Development
..... Parent-Chick Recognition
..... ..... in Colonial Nesters
..... Creches

DISPLAYS
. TERRITORIALITY
..... Territoriality
..... Interspecific Territoriality

. VISUAL DISPLAYS
..... Visual Displays
..... Duck Displays
..... Shorebird Communication
..... Dominance Hierarchies
..... Bird Badges
..... Redwing Coverable Badges
..... Courtship Feeding

. SONG and SINGING
..... Bird Voices
..... Vocal Development
..... Vocal Dialects
..... Vocal Functions
..... Vocal Copying
..... Nonvocal Sounds

DIET and FORAGING
. GENERAL INFORMATION
..... Diet and Nutrition
..... Drinking
..... Pellets
..... Determining Diets

. FEEDING RELATIONSHIPS
..... Commensal Feeding
..... Mixed-Species Flocking

. FEEDING METHODS OF
.. .. DIFFERENT BIRD GROUPS
..... Dabblers vs. Divers
..... Eating Feathers
..... Flamingo Feeding
..... Piracy
..... How Owls Hunt in the Dark
..... Raptor Hunting
..... Hoarding Food
..... Finding Hidden Caches
..... Hummingbird Foraging Bouts
..... Optimally Foraging Hummers
..... Shorebird Feeding

MIGRATION
.. .. .. ((see also CONSERVATION,
.. .. .. ( below)
..... Migration

..... Navigation and Orientation
..... Shorebird Migration

CONSERVATION
. EXTINCT BIRDS
..... Passenger Pigeon

. THREATENED BIRDS
..... Conservation of Raptors
..... Conservation of Kirtland's
..... ..... Warbler
..... Decline of Eastern Songbirds

. THREATS TO BIRDS
..... DDT and Birds
..... Metallic Poisons

. CONSERVATION THEORY
..... Island Biogeography

CONSERVATION ACTIONS
..... Plume Trade
..... Helping to Conserve Birds
..... ..... - Local Level
..... Helping to Conserve Birds
..... ..... - National Level
..... Feeding Birds
..... Blue List
..... Birds and the Law

. SCIENCE AND CULTURE
..... How Do We Find Out About
..... ..... Bird Biology?
..... Bird Biology and the Arts

BEHAVIOR and
.. .. .. ( PHYSIOLOGY
......Anting
......Headscratching
..... Bathing and Dusting
..... Tool Using
..... Swimming
..... Walking vs. Hopping

. THERMOREGULATION
..... Spread-wing Postures
..... Temperature Regulation
..... ..... and Behavior

. ROOSTING
..... Communal Roosting

. FLOCKING and FLOCK DEFENSE
..... (see also PREDATION, below)
..... Mixed-Species Flocking
..... Flock Defense
..... Sleeping Sentries

. BRAINS and SENSES
..... Hawk-Eyed
..... Avian Sense of Smell

. METABOLISM
..... Metabolism
..... Hummingbirds, Nectar, and
..... ..... Water

.. FEATHERS
..... Color of Birds
..... Molting

. UNFEATHERED PARTS
..... Bills
..... Feet

.. AGING and DISEASE
..... How Long Can Birds Live?
..... Disease and Parasitism

FLIGHT
. FLIGHT and FLIGHTLESSNESS
..... Wing Shapes and Flight
..... How Fast and How High
..... ..... do Birds Fly?

. SPECIAL KINDS OF FLIGHT
..... Soaring
..... Hovering Flight

PREDATION
.. .. .. ( (see also FLOCKING and
.. .. .. ( FLOCK DEFENSE, above)
..... Mobbing

PREDATION AT THE NEST
..... Distraction Displays
..... Empty Shells
..... Gulls Are Attracted to.Their ..... ..... ..... ..... Predators
..... Mice and Ground-nesting Birds

ECOLOGY
. POPULATIONS
..... Population Dynamics
..... Irruptions
..... Range Expansion
..... Avian Invaders
..... Quail Eggs and Clover

. COMMUNITIES
..... Bird Guilds
..... MacArthur's Warblers
..... Urban Birds
..... Feral Birds

EVOLUTION and
.. .. .. ( COEVOLUTION
. EVOLUTION OF BIRDS
..... Birds, DNA, & Evolutionary
..... ..... Convergence
..... Natural Selection
..... Sexual Selection
..... Size and Sex in Raptors

. COEVOLUTION
..... Coevolution
..... Brood Parasitism
..... Parasitic Swallows
..... Parasitized Ducks

. SPECIES and SPECIATION
..... Sibling Species
..... Species and Speciation
..... Superspecies
..... Hybridization
..... Great Plains Hybrids
..... Taxonomy and
..... ..... Nomenclature
..... Passerines and Songbirds
..... DNA and Passerine
..... ..... Classification

SELECTED INDIVIDUAL
.. .. .. ( SPECIES
..... American Coots
..... Thin as a Rail

..... European Starlings
..... Cowbirds see also
..... ..... CONSERVATION