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8 Cards in this Set
- Front
- Back
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Main Characteristics |
- Endotherms - Feathers - Lightweight skeleton, incl toothless beak - Hard shelled eggs - Descend from feathered dinos |
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When? |
- first bird archaepteryx, 155 mya |
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NZ vs World |
- World = mostly land birds - NZ = fairly even split between land, waders and seabirds. |
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Seabirds, Why? |
- Wadders: evolved during landmass reduction (sinking) - Seabirds: lots of coastline and outlying islands. |
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NZ Bird Traits |
- Many primitive groups (eg ratites). - Poor flyers/ flightlessness high that usual. - Not many bright colours. - Long lived slow reproduction, often ground nesting. |
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When NZ |
- 80 mya, godwana split: Wrens, thrushes, possibly moa and some parrots. ~ EROSION/ SINKING~ - Dispersed 23-5 mya: pukeko, giant geese - Dispersed 5-0 mya: parakeets, kereru, many seabirds. - Human introductions. |
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Extinctions |
- Moa, Haast Eagle, huia ect - Hunted, Pests, deforestation. |
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Sea Birds |
- NZ = Seabird capital 25% of all known species - Seasonal migration, many islands and coast, no native predators. |
