31. Now, its foot-wide yellow seed head is visited regularly by the goldfinches . 32. Brush mice living in mine shafts or caves build nests similar to those of goldfinches . 33. The American goldfinch feeds on the fruits. 34. The European goldfinch subspecies " Carduelis carduelis tschusii " was named after him. 35. The site is a useful habitat for birds such as goldfinch , wrens and dunnocks. 36. Some tree seeds, including birch and alder, and the perennial coreopsis also attract goldfinches . 37. The plastic bags remained on the plants even after pollination to prevent migrating goldfinches from snacking. 38. For the same reason, cup plant is popular with hummingbirds and goldfinches , she says. 39. The immature American goldfinch has a dull brown back, and the underside is pale yellow. 40. As of 2007, the oldest known American goldfinch was 10 years and 5 months old.
