Been watching them birds myself for many years. They can definintely be an indicator of what is going on. I also watch the local farm animals, ( cows, horses, etc.) and other wildlife. I have often noticed that when the cattle are up feeding and the deer are moving about, the fish are active as well. Maybe it is just me, but I have been keeping records of all my fishing/hunting outings since the mid 70s and have noted such things along the way. When I look back on my records this has been a common experience on many of my good fishing days. Often when the cattle are just laying around so are the fish.
It is not about the equipment you have to use,
It is about how you use the equipment you have. :D