extremist group. But the precise motive for the attack was unclear.

Turkish news media said preliminary investigations by security officials said the bomber might have detonated a suicide belt prematurely as he was going through security controls. NTV, a private television broadcaster, said embassy security cameras had shown the assailant entering and panicking as he walked through an X-ray machine.

The other fatality in the blast was identified as Mustafa Akarsu, 47, one of the Turkish security guards at the embassy.

The wounded victim was identified as Didem Tuncay, 39, a former foreign news reporter for NTV, who had been en route to a meeting with Mr. Ricciardone at the time. Ms. Tuncay was taken to Numune Hospital in Ankara, and officials there said that the right side of her faceForget the laughing kookaburra—kea are the birds that really tickle each other's funny bones.

The highly intelligent parrot has a specific call, that—like human laughter—puts other parrots that hear it in a good mood. This makes the kea the first known non-mammal to show contagious emotion, joining the ranks of humans, rats, and chimpanzees.

Scientists already knew that kea—native to New Zealand's mountainous South Island—make a non-threatening warbling sound while playing with other kea. But since the birds also warble alone, the noise could simply be an expression of pleasure.

Kea Parrots Respond to Recorded Call With Tussle Play

To find out if kea use their play call to spread emotion among other kea, researchers led by Raoul Schwing, of the Messerli Research Institute in Austria, went to Arthur's Pass National Park