Did you know a hummingbird can fly backwards? A hummingbird flaps it wings so fast, about eighty times per second, that it can remain hanging still in the air. This allows it to fly vertically up- and downwards and as the only bird also backwards. However, this requires so much energy of the hummingbird that its heart has to beat about a thousand times per second. In order to sustain this incredible energy consumption it has to eat all day long. If the hummingbird cannot eat sufficiently for a week, due to heavy rain for instance, it will die of exhaustion.
Dries Persyn
Did you know a hummingbird can fly backwards? A hummingbird flaps it [its]wings so fast, about eighty times per second, that it can remain hanging still in the air. This allows it to fly vertically up- and downwards and as the only bird also backwards. However, this requires so much energy of the hummingbird that its heart has to beat about a thousand times per second. In order to sustain this incredible energy consumption it has to eat all day long. If the hummingbird cannot eat sufficiently for a week, due to heavy rain for instance, it will die of exhaustion.
BeantwoordenVerwijderenClear account, good flow. Mind the grammar error (typo?)
olaf