Nest box camera
Encyclopedia
A nest box camera, also known as a bird box camera, is a device for monitoring birds in nest box
Nest box
A nest box, also spelled nestbox is a man-made box provided for animals to nest in. Nest boxes are most frequently utilized for wild and domesticated birds, in which case they are also called birdhouses, but some mammalian species may also use them. Birdhouses are the most common types of nest...

es. Many pictures and videos of nesting birds can be watched on Internet
Internet
The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite to serve billions of users worldwide...

 sites that broadcast video stream and still images in real time..

Technology

As well as using visible light, infrared
Infrared
Infrared light is electromagnetic radiation with a wavelength longer than that of visible light, measured from the nominal edge of visible red light at 0.74 micrometres , and extending conventionally to 300 µm...

 cameras may also be used; the infrared light not being dangerous to the nesting birds, according to the sites. The camera which is used is usually a web camera. Some of the nest box cameras also have microphone
Microphone
A microphone is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. In 1877, Emile Berliner invented the first microphone used as a telephone voice transmitter...

s inside them. It is relatively easy to construct a nest box camera because often it involves little more than installing a camera in a nest box, remembering only to choose or construct a nest box large enough to contain the camera, and to use a camera suitable for outdoor conditions.

Sources

These sources have been translated to English
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 from Finnish
Finnish language
Finnish is the language spoken by the majority of the population in Finland Primarily for use by restaurant menus and by ethnic Finns outside Finland. It is one of the two official languages of Finland and an official minority language in Sweden. In Sweden, both standard Finnish and Meänkieli, a...

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