There were once 500 to 600 breeding pairs at the Birecik colony, but the population was dealt a heavy blow when agricultural pesticides were introduced in the 1950 ’ s.
Bireciki koloonias oli kunagi 500 kuni 600 kaljuiibise paari, kuid populatsioon sai ränga hoobi, kui 1950 - ndatel aastatel võeti põllumajanduses kasutusele pestitsiidid.