Hooper alleges several flaws in experimental methodology, including gluing the moths in place on parts of trees where they would not naturally settle, feeding birds heavily enough to condition them to expect feeding at that point, artificially boosting recapture rates, altering experiments (unconsciously) to favour the expected outcome, and errors in statistical analysis.
Hooper alega varios defectos na metodoloxía experimental, incluíndo colar con pegamento as avelaíñas en partes das árbores onde non se colocaban de forma natural, alimentando os paxaros o suficiente para condicionalos a esperar ser alimentados nese momento, aumentando artificialmente as taxas de recaptura, alterando os experimentos (inconscientemente) para favorecer os resultados esperados, e erros en análises estatísticas.