nectar
While a hummingbird is sipping nectar from a plant, it is also cross pollinating the plant as it passes from flower to flower.
yes
the butterfly is flitting from flower to flower
It is eating...getting the nectar (sucrose) out of the flower.
With he flowers they get the nectar from. The pollen off the flower gets on the hummingbird's wings and beck. By going from flower to flower, it's just helping the flower pollinate. The hummingbird gets helped also since it gets food from the flower.
Hummingbird
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Hummingbird
The sort of flower a hummingbird pursues largely depends on the species of hummingbird. Each type has its own preferences and is also physically built for certain flowers. For example, the sicklebill hummingbird's beak is drastically curved downward, making it quite proficient at obtaining nectar from flowers in the family Gesneriaceae.
You don't What idiot would want to harm a Hummingbird?
The hummingbird eats nectar which comes from flowers. The hummingbird inserts it's beak into the flower then laps the nectar up with it's tongue.