Edouard Seguin worked with children with heart issues.
The crescent-chested warbler -LRB- Oreothlypis superciliosa -RRB- is a small New World warbler .. Oreothlypis. Oreothlypis. New World warbler. New World warbler. It is common throughout its montane range , from northern Mexico to northern Nicaragua .. montane. montane. Mexico. Mexico. Nicaragua. Nicaragua. It shows an affinity for oaks .. The crescent-chested warbler is superficially similar to both the northern parula and the tropical parula , with yellow underparts , a gray head , and a greenish back , but neither of these has a bold white eyebrow .. northern parula. northern parula. tropical parula. tropical parula. Adult males have a discrete chestnut crescent on the breast , which is less prominent and sometimes lacking in females and young birds .