GigaScience: http://gigadb.org/dataset/101012
Wikipedia: http://en.wikipedia.org/wiki/Downy_woodpecker
Encyclopedia of Life: http://eol.org/pages/1047051/overview
简介：绒啄木鸟是北美啄木鸟里面最小的一种。它能发出多种声音，包括一个简短“pik”的叫声。当啄进树里的时候，同北美啄木鸟不一样，它会发出缓慢的鼓点声。
相关文章:
Zhang et al., Comparative Genomics Reveals Insights into Avian Genome Evolution and Adaptation. Science, (2014).
Jarvis et al., Whole Genome Analyses Resolve Early Branches in the Tree of Life of Modern Birds. Science, (2014).