cactus wrens build their nests in cholla cacti to avoid predators
cholla is cactus. rauhocereus is not cactus. rattail_cactus is not cactus. brady_pincushion_cactus is not cactus. rauhocereus is cactus. cholla is not cactus. turbinicarpus is not cactus. pacherocactus_orcuttii is not cactus. cactus_wren is not bird. pacherocactus_orcuttii is cactus.