> While the number of recorded carcasses increased at the control turbines (7 vs. 18), they decreased at the treated turbines (11 vs. 6 [expected: 28]) (Table 1).
I didn't read the article very closely, but it also reads like they're doing lots of hypothesis tests on different groupings to find significant (p < 0.05) results:
> However, the annual fatality rates fluctuated considerably between years (Figure 3 lower panel), stressing the necessity of a long‐term study. Seasonally, fatality rates (across years) were strongly reduced at the painted turbines after treatment during spring and autumn, but increased during summer (Figure 4). When grouping data by season instead of years, painting reduced seasonal fatality rates by 70.9% (95% CI: 61.7%–77.7%; z = −2.003, p = .042, n = 64).
I'm not convinced.