Query: Birds found in Sierra Madre Oriental that aren't found in Sierra Madre Occidental
Domain: animals
Relevant documents:
Amethyst-throated mountaingem
Red-lored amazon
Gartered trogon
Spot-crowned woodcreeper
Northern bobwhite
Great curassow
Maroon-fronted parrot
Curve-winged sabrewing
Crimson-collared grosbeak
Greenish elaenia
White-faced quail-dove
Black thrush
Singing quail
Crested guan
Blue-capped motmot
Bearded wood partridge
Golden-fronted woodpecker
Tamaulipas pygmy owl