Bohaiornithidae of sexual dimorphism, with the feathers being used by male members of a species for courtship display. A subadult specimen of an indeterminate bohaiornithid described in 2017 preserved feathers on various parts of the head and body which were analyzed and determined to have been iridescent in life. A referred adult specimen of "Bohaiornis" was preserved with a several rocks concentrated in the stomach region. Rocks in the stomach of birds and other animals are often believed to be gastroliths swallowed to assist in the digestion of plant material. However, the rocks apparently swallowed by this specimen are much larger,
What Men Deserve to Lose comparable to dance music due to its driving rhythms, whilst the band's brass section, the Wayward Boys, are given more prominence than on "Croftwork". The variety in the album's usage of keyboards was noted by critics, as was its jazz-influenced percussion; one reviewer observed "some brilliantly worked introductions" and multiple instances of "lead instruments changing within tracks." The reviewer noted that "there’s even a hint of vocals if you listen carefully." The opening track, "The Locks & Rocks Reel", gets its name from a near disastrous boat trip in Sweden from band member Peter Morrison, who wrote the track. "Jason's