Hi I have finished my birdhouse and I made my own design, here it is
The bird I am doing is an American Goldfinch, their scientific is Carduelis tristis . Male Finches are a brighter yellow so they can attract female finches. The females are a brownish colour to blend in to their nests and the juvenile are a brownish colour also so they won't get eaten and they can blend into their nests.
They are 11-13 cm long and 11-20 g. They migrate to mid Alberta to North Carolina during the breeding season and from the Canadian border to mexico in the winter.