Authorities have suggested that migratory bird strikes were the cause of last month's deadly plane crash in South Korea, according to multiple reports.

Pilots’ actions after the bird strike are an early focus of the investigation, according to people familiar with the probe.

Jet engines are incredibly powerful, complex pieces of precision engineering, running at the finest of tolerances; bird strikes can push these tolerances to the limits. When a bird is ingested into an engine, the first thing the unfortunate creature will meet is the fan blades, typically rotating between 2200 rpm and 4500 rpm.

A preliminary report says evidence of a bird strike was found on the Jeju Air plane that crashed into a wall at a South Korean airport, killing 179 people.

The first report on last month’s Jeju Air crash in South Korea has confirmed traces of bird strikes in the plane’s engines, though officials haven’t determined the cause of the accident that killed al

South Korean officials investigating the fatal Jeju Air crash have published a preliminary report of the accident.

The feathers and blood stains on both engines of the Jeju Air plane were from the Baikal teal, a type of migratory duck that flies in large flocks, according to a preliminary investigation report published on Monday.

The authorities are focusing on a possible bird strike coupled with the functioning of the localizer landing guidance structure.

South Korean authorities have submitted a preliminary report on last month's fatal Jeju Air crash to the International Civil Aviation Organization. The ongoing investigation focuses on a 'bird impact' as well as examining the aircraft's engines and landing systems.

The first report on last month's Jeju Air crash in South Korea confirms traces of bird strikes in the plane's engines.