Animal wardens have launched an investigation after a number of ducklings were found dead at Botanical Gardens.A Government spokesman said that the Department of Parks received a report of dead ducklings in the aviary at the Botanical Gardens yesterday.“The animal wardens have collected the animals and will inspect them in order to determine the cause of death, which is unknown at this time,” the spokesman said. “The Department of Parks apologises for any distress or inconvenience caused.”