The three phyla have four characters in common chitinous cuticle that is moulted, rings of scalids on the introvert, flosculi, and two rings of introvert retracts.
32.
Moulted head-plumes in good condition are sought by male Archbold's bowerbirds for use as decorations, and in turn collected from the courtship bowers by humans.
33.
Having moulted into the adult form within about five minutes of emergence, the males patrol a stretch of river about long, seeking out females with which to mate.
34.
The down feathers have been moulted into the immature plumage and at an age of 3 months another moult brings in their subadult plumage; now the two sexes can be easily distinguished.
35.
The surface of cheese which has been colonised by mites may be covered with a fine, grey powder or bloom, due to the mites themselves and their moulted skin and faeces.
36.
In one case silver hen was kept for many years by herself, moulted into cock plumage, & laid only extremely pale green shelled eggs for a few seasons before passing old age.
37.
Because they appeared quickly in geological time, and moulted like other arthropods, trilobites serve as excellent index fossils, enabling geologists to date the age of the rocks in which they are found.
38.
Juvenile and freshly moulted water rails may show a buff undertail like spotted crake, but that species'plumage is spotted with white, and it has a much shorter, mainly yellowish bill.
39.
It is, of course, in breeding plumage in the southern summer, when the Arctic tern has moulted to its non-breeding plumage ( though this is not useful for separating it from another species, the South American tern ).
40.
For lineages more primitive than the advent of flight, like " Similicaudipteryx ", this would not have been an issue, and all the wing and tail feathers of primitive feathered theropods may have moulted simultaneously, more like penguins than flying birds.
