AWOL GOLDFINCH AND SISKIN

Hi everyone from a very cold -12 area of the Highlands.  First time on this type of forum so please forgive my English and blethering. Question is, during the first national lockdown we had glorious weather and fed al, the local birds daily and of course continue to do so, we had bucket loads of Siskins and Goldfinch everyday including watching parents with their babies, wonderful.   Sadly our Nyger seed feeders haven’t been touched for weeks, where have they all gone????