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Paint & dye

uv fluorescent powder

ankle rings

wing tags

Shell notching

Scale clipping

Horn or antler marking

Hot/freeze branding

Tattoos

Electronic identification

Passive intergraded transponder

Radio collars

GPS collars

Satellite tags

Acoustic transmitters

Scars & deformities

DNA analysis

Photo indemnification

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GPS Collars: These collars use GPS technology to track an animal's movements, often with a higher resolution than satellite tags.

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Tags are used to monitor, track and locate sharks in their natural habitat. Tagging provides scientists with important information on life histories, population sizes, movement and migratory patterns,

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This is a type a tracked put on a seal that is superglued onto the back of the neck that falls out after their annual malt.

They record data and the seals location

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Rhinos are given individual distinct cuts in their ears for identification processes, as well as having transmitters fitted to their horns.

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Tracking devices, called tags, can be attached to whales via suction cups or implantable darts. The tags can show the animal's location, behaviour, swim speed, dive depth, and health. Some tags even record sounds made by the whales.

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Dyes can be introduced into the animals food to produce dyed fat, teeth and pelage, and droppings. Self affixing collars have been developed for several specied. Dye spraying devices fixed to aircraft have been used for marking large mammals and large numbers of white birds such as white geese and egrets.

Dyes can also be placed on eggs and nests which marks the adults as they incubate their eggs.