YANGON — Measuring around 17 centimeters in length and weighing about 1 ounce, the Jerdon’s babbler of Mayanmar is a small brown bird that is similar in appearance to a common house sparrow. Discovered by pioneering British botanist Thomas C. Jerdon in 1862, the Jerdon’s babbler is best known for its caramel-colored plumage, for its distinct song, and, since 1941, for being extinct — that is, until last May, when a team of naturalists was shocked to encounter the chirpy little chap darting around the central grasslands of this southeast Asian nation. Announced in a scientific journal this month, the resuscitated creature was found with other feathered friends of the same genus.