So, the human eye notices the colour red even at the smallest percentage as they look at surrounding area.
Look at RED BUSES, RED STOP SIGNS, RED SPORTS CARS, RED ROSES, RED TELEPHONE BOXES.
So colourful birds take my eye. The finch family are a wonderful confection of colour and elegance from the chaffinch to the goldfinch to the greenfinch which can all be viewed on this site.
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