CAS Avian Biology & Behavior — Questions and Answers
Question 1: What is the primary function of a bird’s keel bone?
- To store calcium for egg production
- To support flight muscles (Correct answer)
- To assist in digestion
- To aid in thermoregulation
Correct answer: To support flight muscles
The keel bone provides an anchor for powerful flight muscles, enabling birds to achieve flight efficiently.
Question 2: Which part of a bird’s anatomy is responsible for producing sound?
- Larynx
- Syrinx (Correct answer)
- Crop
- Cloaca
Correct answer: Syrinx
The syrinx, located at the base of the trachea, is the specialized vocal organ that allows birds to produce sounds.
Question 3: What is the primary reason birds engage in preening behavior?
- To regulate body temperature
- To maintain feather health (Correct answer)
- To attract mates
- To remove parasites only
Correct answer: To maintain feather health
Preening helps birds maintain feather health by removing dirt, aligning barbs, and spreading protective oils from the uropygial gland.
Question 4: Why do some bird species migrate long distances?
- To avoid competition with other species
- To access seasonal resources (Correct answer)
- To develop stronger flight muscles
- To escape from predators
Correct answer: To access seasonal resources
Birds migrate to access seasonal resources, such as food and nesting sites, that are unavailable in their breeding grounds year-round.
Question 5: Which sense is highly developed in most bird species?
- Smell
- Vision (Correct answer)
- Taste
- Hearing
Correct answer: Vision
Vision is the most developed sense in birds, allowing them to detect prey, navigate, and recognize mates with high precision.
Question 6: What is a primary social behavior seen in many bird species?
- Flocking (Correct answer)
- Hibernation
- Solitary nesting
- Burrowing underground
Correct answer: Flocking
Flocking provides birds with increased protection from predators, easier access to food, and social interaction benefits.
CAS Avian Biology & Behavior
What is the primary function of a bird’s keel bone?