observador

adj. observant, sharp eyed, meticulous

n. observer, onlooker; scout

adj. eyewitness, observer; scout, scrutator; spectator, watcher

n. eyewitness, observer; scout, scrutator; spectator, watcher

= observer, sharp-eyed, viewer, observant.
Ex: A number of observers and critics of professional education for library and information work has expressed concern at the failure of SLIS to respond rapidly and sensitively to such IT induced changes.
Ex: Sharp-eyed researchers noted that twenty-three per cent of the people who came did so in order to meet someone or to use the phone.
Ex: Informative abstracts have been compared to a skeleton with all the flesh missing -- the viewer is given enough detail to accurately reconstruct what the departed soul must have looked like.
Ex: Every member of staff has a duty to be observant where safety is concerned.
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* como un observador que pasa desapercibido = fly-on-the-wall.
* fiabilidad entre observadores = interobserver reliability.
* observador de aves y pájaros = birder, birder, birdwatcher [bird-watcher].
* observador industrial = industry watcher.