CAS Cheat Sheet 2026

The 30 highest-yield CAS facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which continent is the native range of African Grey Parrots (Psittacus erithacus)? → Africa
2. What is the primary cause of bumblefoot in birds? → Inappropriate perches and obesity
3. Why do some bird species migrate long distances? → To access seasonal resources
4. Which tool or methodology is most appropriate for analyzing avian biology & behavior outcomes? → Maintaining professional boundaries while building collaborative relationships
5. What is the typical clutch size for a Double Yellow-headed Amazon parrot (Amazona oratrix)? → 2–4 eggs
6. Which tool or methodology is most appropriate for analyzing habitat & conservation outcomes? → Maintaining professional boundaries while building collaborative relationships
7. What characteristic defines a 'monomorphic' bird species in terms of identification? → Males and females look identical or nearly identical
8. Which perch material is generally considered most beneficial for avian foot health? → Natural wood branches of varying diameters
9. A new regulation impacts habitat & conservation procedures. What should a CAS professional do first? → Ensuring compliance with current regulatory requirements and standards
10. Which nutrient is essential for feather growth and maintenance in birds? → Protein
11. What is the key distinguishing characteristic of lories and lorikeets compared to other parrots? → They have a specialized brush-tipped tongue for consuming nectar and pollen
12. Which scenario would require a avian specialist professional to escalate a avian biology & behavior concern? → Creating feedback mechanisms that encourage continuous improvement
13. Which physical characteristic is unique to cockatoos compared to other psittacines? → A movable crest of feathers
14. Which of the following signs most strongly indicates that a bird's environmental temperature is too cold? → Fluffed feathers and shivering
15. Which region of the world has the greatest diversity of wild parrot species? → Central and South America
16. What is the most common mistake professionals make when implementing nutrition & diet strategies? → Developing contingency plans for high-probability risk scenarios
17. In hand-rearing chicks, at what point should feeding stop to avoid crop stasis or aspiration? → When the crop is visibly full and slightly firm
18. What is the primary benefit of offering birds a varied diet? → To provide all essential nutrients and prevent deficiencies
19. In the context of avian specialist, which principle most directly governs nutrition & diet practices? → Applying evidence-based methodologies with peer-reviewed support
20. What is the approximate incubation period for a Budgerigar (Melopsittacus undulatus) egg? → 18 days
21. The Eclectus parrot (Eclectus roratus) is notable because males and females look dramatically different. What color is the male? → Bright green with red and blue markings
22. What feature distinguishes Amazon parrots (genus Amazona) visually from macaws? → Amazons are stocky with short tails and no bare facial skin
23. Which substrate is generally considered safest for the bottom of a bird cage? → Plain newspaper or paper towels
24. Which of the following correctly pairs a bird species with its family classification? → African Grey Parrot — Psittacidae
25. What is the most common mistake professionals make when implementing habitat & conservation strategies? → Developing contingency plans for high-probability risk scenarios
26. How can individuals help support bird conservation efforts? → Planting native vegetation and installing bird feeders
27. How should a bird's sleeping area be managed to support psychological health? → Provide 10–12 hours of darkness in a quiet area nightly
28. How frequently should eggs be turned during artificial incubation to support proper embryonic development? → At least 3–5 times per day
29. Which term describes the featherless, highly vascularized area of skin that develops in many birds during breeding season to transfer heat directly to eggs? → Brood patch
30. DNA sexing via blood or feather samples in parrots provides which advantage over surgical endoscopic sexing? → It can be performed at any age with no anesthesia risk