Well this could be an advantage to the insects because the insects can conceal with the color of the sticks. This trait could have evolved the through natural selection because its a chance of staying alive.
An exclamation used as a greeting, to call attention, as an exclamation of surprise, or to encourage one. This variant of Halloo and Holloo has become the dominant form. In the United States, it is the most common greeting used in answering a telephone.
ARGENTINA Sp/Eng. Hello people! Has the first phrase the same meaning as the second one? (UK informal) If you say that the penny (has) dropped, you mean that you or someone else suddenly understands or becomes aware of something that you or they did not know about before.