The birds start arriving from around August during the northern hemisphere winter and leave in March and April.
"Even near BIA there are two or three bird strikes per month," Sri Lanka's Ceylon Today newspaper quoted SriLanka chief executive Kapila Chandrasena as saying.
"It is a normal thing where airports are concerned."
The newspaper quoted director general of Sri Lanka's Civil Aviation Authority of Sri Lanka, H M C Nimalasiri as saying that airport authorities are in touch with Sarath Kotagama, a Colombo University professor who is a well-known ornithologist.
"The BIA had reported around 12 or 13 bird strikes in 2012 while the Trichy Airport has reported 38 bird collisions in 2012," Ceylon Today quoted Nimalasiri as saying.
The report said the aircraft had 40 passengers at the time of the bird strike. Other reports said the cockpit windscreen had cracked.
Bird strikes can damage jet engines and cause big losses. Reports said an aircraft which was on a test run before the airport opened on March 18 had also run into a flock of birds.
Sri Lanka's Hambantota district lies at the termination of an Asian bird migratory flyway, where large flocks of waders in particular move along the coast to settle and feed at the wetlands that expand in the area during the North East monsoonal rainy season.
Source - lbo