U.S. net Nat Geo Wild is to air four wildlife specials across April and June, including a one-off in which naturalist Sir David Attenborough (pictured) reveals the creatures he would most like to save from extinction.

Attenborough’s Ark, premiering April 21 at 8 p.m. EST, sees the filmmaker highlighting several lesser-known creatures that are at risk, including black lions, tamarins and Sumatran rhinos.

Following on April 28 at 9 p.m. is Hummingbird, a special looking at the titular warm-blooded creature, which is capable of both forward and backward flight; and on June 16 at 8 p.m. the net will air A Penguin’s Life, which shows how parents protect their chicks in frigid conditions.

Finally, three-hour miniseries Wild China will premiere on June 30 at 8 p.m. with three back-to-back episodes. The series offers rarely seen Chinese wildlife, including giant pandas, Asian elephants and gibbons.