What does the Hummingbird have in common with the Kiwi (bird, not fruit)?

What is unusual about this bird's courtship behavior?

Like most snails, most Banded Tulip shells have a right handed spiral. With the opening facing you, and the point up, the shell spirals to your right. A few, lucky snails in most species spiral to the left. Why does that make them lucky?

We have been finding these clusters of sprouts all around the yard. They are always the same kind of plant. What are they, and why do they grow this way?

We have quite a few of these birds visiting our garden. They are specially adapted for avoiding a specific parasite. What is the bird, and how does it avoid the parasite?