I think these birds are called great grey herons. They are usually shy, staying far away from human being.
1. They usually just stand their, barely moving.
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3. Once in awhile, they would do something, lasting about one second. If you are not really concentrated, you would miss it. The following taking off sequence lasted 0.3 sec.
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7. Now it is in the air, flying for a few seconds, and lands
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13. Vertical take off, lasting 0.5 sec.
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19. Occasional wing display
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