Where are all the goldfinches?

I've been noticing a significant decline in the number of goldfinches in my local area. Could you possibly explain what might be causing this phenomenon? Have there been any recent changes in the environment, such as loss of habitat or food sources, that might explain their disappearance? I'm also curious to know if this trend is isolated to my region or if it's a more widespread issue. Could climate change be a contributing factor? Additionally, are there any conservation efforts being undertaken to protect and restore the goldfinch population? I'm deeply concerned about the welfare of these beautiful creatures and would appreciate any insights you could provide.