What an amazing project - actually being able to track them on their incredible journey. No I haven't heard one yet either

- we always used to get them here.
Blackbirds all busy scolding the cat whenever she goes outside so will be busy feeding their young... and finally - blue tits eating the fat-balls! (Having ignored them all winter - threw away the rancid old ones, got some new ones and hey presto they've been discovered!). Also the flowering shrubs have all burst into flower and leaf so giving the birds somewhere to shelter before feeding.
Hurdity x