I have a smallish suburban garden with lots of mature shrubs and a HUGE fir tree very close by. I regularly watch the pair of robins, blackbirds (bossy and possessive creatures), titmice, blue and coal tits, occasionally a lovely little wren, magpies, dunnock, hedge sparrows (always noisy and mob-handed) and others too fleeting to more than glimpse. The huge, dense fir seems to house loads of 'em.