The favorite bird of all, the Northern Cardinal.  You can build this from 318 mini blocks.

Finished size is 3 3/8 x 4 3/8 x 4 1/2 inches.

For ages 12 and up (that’s what our boxes say) even though their site says 7 which is where we got the image.  Small pieces can be a choking hazard.  The company recommends these can be used by any age with adult supervision.