my garden has gone a bit quiet too, still got the regulars magpies, robins, dunnocks, blackbirds, thrushed asstd pigeons/doves blue/great/coal/longtailed tits and green/gold/chaffinches haven't seen the jays, woodpeckers or nuthatches for a week or so and I expect the siskins have moved out to the country
No evidence of predators maybe someone nearby has started feeding and attracted them away