The TV naturalist said cat owners should buy bell collars for their pets to help stop the deaths.
Sir David, 87, features the robin on the Christmas Day edition of Radio 4 programme Tweet Of The Day.
He told the Radio Times that cats and the cold winter weather, when frozen ground makes it difficult to find food, are the biggest problems faced by birds.
"Cats kill an extraordinarily high number of birds in British gardens," the broadcaster said.
Asked whether cat owners should buy bell collars for their pets at Christmas, he replied: "That would be good for the robins, yes."
The presenter also warned that scientists should not attempt to bring back species such as the woolly mammoth.
TV presenter Alice Roberts recently urged society to "grapple with" the issue of bringing Ice Age animals back from the dead after Japanese scientists extracted the bone marrow from woolly mammoth remains with a view to resurrecting the creature.
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