Another trick for timing of bird photography is to know where the birds are going to be. So if you know where there favourite food source or perment water is hand around there and wait, they will eventualy show up, you can be all set up exposure wise focus etc. and then wait for something to happen, In cases like that I use a remote shutter release, usualy an infrared trigger, or I can use a mobile app on my phone to trigger my canon cameras, control the focus point and set apature and shutter speed all from the phone and also trigger the shutter, so I can be further away from the subject with out scaring it. This one was with the remote trigger the bird and flower are in the local botanic gardens and these one (Noisy Miners) are certainly not shy. Knowing where there food is certainly helps.