What are these birds doing?

Question

Today I saw a very large number of birds flying in the sky and every time they increase in number and a new group joins them. Believe me this is the first time I have seen this large number of birds. What are they doing? why did they all gather in the sky in one place?

Answer 1

i think what you saw were homing pigeons, ppl raise lots of pigeons as pets and sometime they gather them up, take them somewhere like a park, and set them free to let them find their own way back home

them gathering in the sky is either for flying around for fun or to catch some insects, the numbers growing were probaby when the owner set another bunch free

Answer 2

They may be mobbing a predator bird as they call out and get as many as possible to do this. Or they may be migrating the more the better for birds. the larger the group the more confusing to predators.