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It has a thin, insect eater's bill
The male's breeding bed stripe has de orange centre
The male's breeding head strip
The Goldcrest can lay up to 12 eggs in a clutch, which is about one and a half times the adult female's bodyweight.
Feeding on soft-bodied insects and insect eggs
The frantic search for food
Captive individuals have starved to death in less than an hour
That's the "advertising" call of the last known male Rabbs' Fringe-Limbed Tree Frog
It was recorded by Keith Hughes, but not in the species' range on a volcano's flank in Panama.
Starting in the 1990s, the chytrid fungus (Bd) had swept through, wiping out most tropical frogs there.
By 2011, Panama's forests were silent.
Keith Hughes recorded his "advertising" call in 2015.
Toughie was found dead by his keepers on September 26, 2016.
The species is presumed extinct.