Most times now there are around 50 Goldfinch here in my yard.
They breed in Fall as opposed to Spring so numbers drop till Winter brings them back in numbers.
They like Sunflower and I keep out a lot of it in large tube feeders. They are active and fun to watch. They will color back up in Spring.
With them and the Chipping Sparrows, the yard is always packed with birds in Winter.
Their numbers and activity draw in many other bird types who might otherwise not notice my yard.