Binoculars – an equipment adapted for use by both eyes at once

Bird – the only animal with feathers; all kinds have two legs, lay eggs from which their young are hatched and have wings although some species cannot fly.

Bird Banding – the tagging of wild birds with identification bands or rings for the purpose of bird study

Bird Bath – any shallow enclosure that can be filled with fresh water to attract wild birds to bathe in or drink water from

Bird Call – a vocal sound produced by a bird, usually to communicate with birds of the same specie

Bird Feeding – the providing of supplemental food and water for wild birds

Birdhouse – a man-made nesting place for birds

Bird List – a checklist containing the names of each species of birds seen with a notation on where and when it was observed

Bird Sanctuary – traditionally, a place of refuge where birds are protected from physical harm

Bird Watching – identifying or observing birds in their natural environment

Cavity-Nesters – bird species that require cavities, usually in wood in which to build nests and lay eggs

Dimension – any measurable extent or magnitude, as length, breadth or thickness

Drainage – the means to draw water or any fluid from

Feather – one of the horny, elongated structures which form the body covering of birds and provide the flight surface for their wings

Feeders – a shelf, tray or a relatively elaborate structure where bird food is placed

Field Guide – a small book packed with information about birds which describes and shows pictures while providing the details of each bird that should be looked for

Field Of View – is the width of the scene that is in view

Fledgling – refers to a bird from the time it leaves the nest until it no longer depends on its parents for food

Gleaning – technique used by birds to pick-off insects from trees, branches, walls or the ground

Habitat – the region where a race, specie or individual naturally or usually lives or is found

Hatch – to bring forth a young from the egg by incubation

Incubation – the process of warming the egg

Magnify – to increase the apparent size, as by a binocular

Migration – the act of moving periodically from one region or climate to another

Multiple Brooding – raise two or more broods of young every year

Nest – the habitation prepared by a bird for the hatching of its egg and the rearing of its young

Nestling – refers to a bird from the time it hatches until it leaves the nest

Open Nesters – bird species that will not nest in enclosed areas

Ornithologist – a scientist who specializes in the study of birds

Ornithology – the study of birds

Parasite Species – bird species that lay their eggs in the nest of other species

Perch – a staff, pole, or slat variously used at any place on which birds alight or rise

Predator – an animal that lives by preying upon others

Roost – any place where birds resort to spend the night

Single Brooding – raise only one brood of young every year

Species – a category of animals or plants subordinate to a genus but above a breed, race, strain or variety

Suet – the hard fatty tissues around the kidneys of cattle and sheep

Sweeping – technique used by flying birds where they open their beaks and catch flying insects and eat them while in flight

Territory – an area around the nest usually including feeding habitat that most backyard birds will defend

Ventilation – an opening for the purpose of producing full circulation of air