Same size as a House Sparrow, but more slender overall. Adult birds are 12.5 to 15 cm and span 20 to 25 cm.
size
During which two years was the average finch beak size nearly the same?
32 c
no in fact they differ greatly in size , color , shape and diet.
Your finch may be stressed from the environment/ size of the cage or whatever bird is with her may be plucking them out!
Roughly 22 x 16mm, 3g
Yes it can. But make sure birds are about the same size, and they have enough feeding places and perches to avoid fighting of resources.
house finch, gold finch, purple finch, zebra finch, parrot finch, society finch, bengalese finch, lady gouldian finch, spice finch, red bow firetail finch, canary finch, Australian finch
14 different species all originating from one common ancestor that is thought to have it's origin in the Caribbean and not the main land of South America as once thought, there are Warbler finches, they divide into 2 insect eating species called, the Green Warbler finch and the Gray Warbler Finch. The seed eater is the Sharp-beaked ground finch and a bud eater called the Vegetarian Finch. Another group is Tree Finches that divide into Insect Eaters, the Mangrove Finch, Woodpecker Finch, Medium Tree Finch, Small Tree Finch and Large Tree Finch. And the last group is the Ground Finches that divide into 2 groups the first is the cactus flower-eaters which are Large Cactus Ground Finch and the Cactus Ground Finch. The second sub group is the Seed Eaters, Small ground Finch, Medium Ground Finch and the Large Ground Finch.
mountain bluebird
A finch's beak is usually short, thick, and conical in shape. It is adapted for cracking seeds and nuts, their main food source. The size and shape of the beak can vary between finch species depending on their diet and habitat.
Geospiza Fortis is a ground finch bird that is medium size. This bird part of the Thraupidae family.