Goldfinches on thistles

Goldfinches like thistle seed.....
I set up an IP camera next to a large thistle in the hope that goldfinches would come to eat the seed. I was in luck as they arrived almost immediately and stayed for several days until all the seed was eaten. Goldfinches are quite sensitive and usually fly away if they see somone coming, so this was an ideal way to watch them without disturbance.

An HD analogue CCTV camera (AHD or HD-TVI with a recorder) could be used rather than an IP camera.