RMOT 101 Birds part 1
🇬🇧
In Inglés
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RMOT 101 Birds part 1 - Marcador
RMOT 101 Birds part 1 - Detalles
Niveles:
Preguntas:
16 preguntas
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| What are some characteristics of birds? | • Feathers • Wings • Bill • Specialized skeleton • Hand, head, pelvis, feet • Centralized body mass • Endotherms (40-44oC) • Efficient circulatory and respiratory systems • Rapid and efficient digestive system • Advanced nervous system and acute vision • Reduction in the number of some organs • Oviparity |
| What are the purpose of feathers? | – Support for flight – Insulation / water-proofing – Signalling, camouflage |
| What is a passerine bird? | Perching bird |
| What are 6 keys to identifying birds? | 1. Size & Shape 2. Colour Pattern 3. Field Marks 4. Behaviour 5. Habitat 6. Songs & Calls – not as helpful for all birds |
| What are 3 factors that account for difference in plumage within the same species? | Age, sex, and season |
| How do most birds moult? What kind of birds are the exception and how do they moult? | One pair of feathers at a time to maintain balance Waterfowl; they shed feathers all at once |
| How do birds navigate when migrating? | • Magnetic compass • Celestial navigation – Solar + Moon and stars • Navigation by sight – Topographical landmarks |
| Why do birds migrate North? | • Benefits must offset costs – Day length – longer days to feed / raise young – Space – 8X more = Less competition + don’t need to wait to breed – Food – quantity, quality, less exploited – Fewer predators and parasites |
| What are the 4 main flyways birds use to migrate? | • Atlantic • Mississippi • Central • Pacific |
| Why do some ducks migrate to moulting areas? | – Abundant food – Protection from predators |
| What are the 2 types of newly hatched birds? | – Precocial • Covered with down • Can run, swim or walk when they hatch • E.g., waterfowl, gamebirds – Altricial • Naked and vulnerable • Remain in the nest • E.g., raptors, songbirds |
| Why is monogamy prevalent in birds? | 1. Both parents required to raise young – Especially altricial young 2. Males can’t monopolize resources required to support extra mates |
| What are the 3 purposes of courtship displays? | 1. Ensure same species breed together 2. Synchronize reproductive cycles 3. Help partners assess each other |
| What is a lek? | An area where males congregate to engage in courtship rituals |
| What are the benefits of leks? | Females can compare males Safer from predators |