Binoculars revolutionised bird identification and field observation.

These books were focussed on bird identification rather than collecting and were affordable to the general public.

His contributions to that journal include many articles on bird identification.

The colour, shape or other features of the supercilium can be useful in bird identification.

He wrote numerous books about birds and bird identification.

Don't get depressed - bird identification is difficult and there is no quick way to proficiency.

Key content areas include bird identification, site guides, skills development, recent sightings and news and reviews.

Mr. Peterson narrates a more useful video about bird identification on his disk.

Gantlett's specialism as an ornithologist is the advancement of bird identification.

It goes beyond mere bird identification to explain such matters as pelican bill adaptation and the "lek mating system" of the prairie chicken.