WILD 3580 1st Edition Lecture 31 Outline of Last Lecture I Feather Types II Number of Feathers III Plumage and Molts Outline of Current Lecture I Molt II Color Current Lecture I Molt Partial Complete o Sequential molt flight feathers replaced in sequence o Simultaneous molt flight feathers are replaced all at once short flightless period Humphrey and Parks 1959 o Songbird pair bonds at breeding grounds Date May June Aug Feb Aug Feb Event Hatch molt molt molt molt molt Molt N A prejuvenal 1st prebasic 1st prealternate 2nd prebasic 2nd prealternate Extent N A complete partial partial complete partial Plumage natal down juvenile plumage 1st basic nonbreeding 1st alternate breeding 2nd basic 2nd alternate o Ducks pair bonds in winter grounds and migrate together to breeding site need to plumage breeding feathers earlier Date June July Aug Sept Aug Event Hatch molt molt molt molt Molt N A prejuvenal 1st prebasic 1st prealternate 2nd basic These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II Extent N A complete partial partial complete Plumage Natal down juvenile 1st basic eclipse 1st alternate nuptial 2nd basic Color Produced in 2 ways 1 Pigments chemical compounds that absorb incident light 2 Feather structure Pigments o Melanins Blacks browns grays dull reds and yellows Most common types of pigments Can occur in all feathers almost always in flight feathers Increased amount of keratin o Carotenoids Bright red yellow orange Derived exclusively from the diet Most common in the body feathers rarely in the flight feathers o Porphyrins Browns reds greens Most common are brown pigments in owls pigeons and galliforms Chemically related to hemoglobin fluorescent under UV light
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