Eastern rockhopper penguin Eastern rockhopper penguin The eastern rockhopper penguin ("Eudyptes chrysocome filholi") although genetically different is still often considered a subspecies of the southern rockhopper penguin. This species of penguin is also known to be one of the smallest species of penguins they are approximately 45–55 cm in length, and weighing 2.2–4.3 kg. The adult eastern rockhopper penguins feed on small fish, octopus, squid, and krill-like crustaceans. The rockhopper penguin "Eudyptes chrysocome" is sometimes considered two species, northern and southern rockhopper penguin, after research published in 2006 demonstrated morphological, vocal and genetic differences between the two populations. Molecular datings suggest that the
What Bird is That? of "What Bird is That?" It was published in 1984 and incorporated all of Cayley’s paintings created over many years for his vision of releasing a “big bird book” and included a revised taxonomy. In the 53 years since its first edition, more than a hundred new bird species had been identified in Australia. Scientific names had been changed and groups of birds had been reordered. Lindsey brought "What Bird is That?" up-to-date with the latest birding conventions of the time, as well as contributing a valuable supplementary list of birds and a scholarly catalogue of Cayley’s paintings. The "Signature