To determine how many times more bird species there are than frog species, we can divide the population of bird species by the population of frog species.
The populations given are:
- Birds: \( 3.4 \times 10^2 = 340 \)
- Frogs: \( 2.2 \times 10^1 = 22 \)
Now we divide the number of bird species by the number of frog species:
\[ \frac{340}{22} \approx 15.45 \]
This rounds to approximately 15.5 times.
Thus, the correct response is:
15.5 times more bird species.