![](http://www.alamy.com/thumbs/6/64E726AB-C350-4998-80B2-8FFB6BA7C7CC/2ACJXR6.jpg)
Agate (Silicon dioxide) specimen.
Size: 5125px × 3410px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: animal, artwork, australia, avian, biological, biology, bird, birdlife, birds, blue, clytospiza, crop, dusky, dybowski, eater, estrildid, estrildidae, euchistospiza, fauna, feeding, female, finch, firefinch, food, group, history, illustration, lagonosticta, male, natural, nature, oat, ornithological, ornithology, pair, passerine, perched, plumage, red, seed, sheaf, species, uraeginthus, vertical, watercolour, weaver-finch, wild, wildlife, woodcock, world, zoological, zoology