How large you may ask..... about 4000 and counting.
After the tsunami in Chennai, India a decade ago, a camera repairman who goes by the name Sekar found two displaced parakeets near his home and started to feed them. The birds nested there, and then they bean to multiply... and multiply.....
Now 62 year old Sekar wakes every day at 4am to begin cooking rice to feed his flock. He spends 40% of his income to keep the parakeets fed twice daily. This is what that looks like:
Via This Is Colossal