Macaroni penguin been considered separate species, but the close similarities of their DNA sequences has led some, such as the Australian ornithologists Les Christidis and Walter Boles, to treat the royal as a subspecies of the macaroni. The two species are very similar in appearance; the royal penguin has a white face instead of the usually black face of the macaroni. Interbreeding with the Indo-Pacific subspecies of the southern rockhopper penguin ("E. chrysocome filholi") has been reported at Heard and Marion Islands, with three hybrids recorded there by a 1987–88 Australian National Antarctic Research Expedition. The macaroni penguin is a large, crested
Romano's Macaroni Grill company-owned stores. On December 18, 2008, Brinker announced that a majority stake in the chain was sold to Mac Acquisition LLC, an affiliate of Golden Gate Capital. As of June 29, 2011, Brinker still holds a 15.6% minority interest in the concept. On 6 February 2013, Ignite Restaurant Group announced the acquisition of Romano's Macaroni Grill from Golden Gate Capital through a $55.0 million all-cash transaction. Redrock Partners LLC purchased the concept from Ignite in April 2015 for $8 million US. On October 18, 2017 Romano's Macaroni Grill filed Chapter 11 Bankruptcy. Romano's Macaroni Grill menu features items found in