B95 (center, with orange leg band) recently in Argentina. (Photo by Luis Benegas)

“The last we heard of a red knot known as B95 — after his tag — he was in Canada. It was August, and he was on his way south.

As usual, scientists studying red knots figured it might be their last sighting of him. No bird lives forever, they keep telling themselves.

But recently, he’s been spotted — several times! — on wintering grounds at Rio Grande, at the southern tip of Argentina.”

Read more from the Philadelphia Inquirer