sentences:  Dr. Timmins did not realize the importance of his discovery until he visited a Natural History Museum in Tring, England.There he examined a specimen of a large-billed reed warbler, which looked identical to the bird he had seen and recorded.A team of ornithologists, including Afghan scientists of the Wildlife Conservation Society, confirmed his discovery by capturing, sampling and releasing almost 20 specimens of the bird in 2009, the largest number ever recorded, using a combination of field observations, museum specimens, DNA sequencing, and also the first known audio recording of the species that were already made in 2008.