Your original sentence is good, but I can help make it a little clearer and smoother. Here's a corrected version:
Tropical birds have unique looks and special skills. Shiny peacocks, tough shoebills, speedy cassowaries, and hummingbirds can even fly upside down and backwards.
Explanation:
- Added "special" before "skills" to make it easier to understand.
- Added commas between the bird names for better clarity.
- Linked the hummingbirds' flying ability with the previous sentence, making it a complete idea.