Crossbeak is a deformity in birds that causes their beak to cross over their face, making it difficult for them to eat or groom themselves properly. There are several synonyms for crossbeak, including the terms crooked beak, twisted beak, and wry beak. Other alternatives include the phrases cross-billed, crossbill, and crossed mandible. No matter how it's described, this condition requires special care and attention to ensure the affected bird is able to receive the proper nutrition and maintain their overall health. With appropriate care, however, birds with crossbeak can live happy and healthy lives.