Northern rockhopper penguin truly different, in terms of more than reproductive isolation and some morphological features, was found in the mitochondrial sequences of the three species. It was found "E. c. filholi" and "E. c. chrysocome" were not as different genetically as "E. c. moseleyi" was to the other two subspecies. The level of genetic differentiation was similar to the genetic difference found in other penguin subspecies groups. Another way that scientists were able to differentiate the different subspecies of rockhoppers were in the parasites that fed off each separate rockhopper penguin species. Penguins are parasitised by 15 species of chewing lice in
What the Little Bird Told Him an average score of 6.5 out of 10 on the review aggregator Rotten Tomatoes, with the site's consensus stating: "The character work in 'What the Little Bird Told Him,' along with the comeuppance of the Electrocutioner, are strong enough to overcome the anti-climactic face-off between Fish and Carmine Falcone." Matt Fowler of IGN gave the episode a "okay" 6.4 out of 10 and wrote in his verdict, "I almost want to forgive the head-scratching moments from this week's Electrocutioner story since "Gotham"s usual M.O. for these types of villain cases is to dumb things down. Easy investigation, few bits of