The sequence of molt of the body plumage can be described more accurately 

 from freshly killed specimens than from Hve birds, or from dried skins. The 

 condition of the molt was noted in seven freshly killed young greater prairie 

 chickens in the summer of 1951. The notes made from these birds form the 

 basis for the following descriptions. 



No. 30490 KU. Male. Molt of primaries slightly advanced over that of 

 birds forty-one days old. First-winter primaries 1-3, 95, 66, 21 mm. long; 

 juvenal primaries 4-10, 89, 96, 99, 110, 106, 54, 40 mm. long; primaries 1, 

 2, 3, 8, 9, 10 growing; secondaries all juvenal; interramal, infra-ocular and 

 supra-ocular regions with natal down; pedal tract with sheathed juvenal 

 feathers; all other regions juvenal. 



No. 30469 KU. Female. Primary replacement same as in female fifty-five 

 days old. First-winter primaries 1-5, 106, 112, 97, 62, 11 mm. long; juvenal 

 primaries 6-10, 111, 122, 133, 112, 87 mm. long; first-winter secondaries 3-4, 

 31 and 5 mm. long; other secondaries juvenal; capital tract juvenal throughout; 

 cervical and interscapular regions with first-winter feathers interspersed with 

 juvenal feathers; no replacement in posterior dorsal region; three central rec- 

 trices missing ( thought to be accidental ) ; ventral tract with first -winter feathers 

 throughout, not showing beyond juvenal feathers except at superior margin of 

 sternal region; femoral and crural tracts with first- winter feathers as sheaths, 

 not visible beyond juvenal feathers. 



No. 30470 KU. Male. A sick bird from same brood as No. 30469 KU. 

 First-winter primaries 1-5, 105, 105, 109, 93, 36 mm. long; juvenal primaries 

 6-10, 115, 125, 128, 109, 80 mm. long; first-winter secondaries 3-4, 79 and 

 36 mm. long; otherwise as in No. 30469 KU except all rectrices present. 



No. 30493 KU. Male. Primary replacement same as in two birds sixty days 

 old. First-winter primaries 1-5, 107, 115, 112, 84, 41 mm. long; primary 6 

 missing; juvenal primaries 7-10, 126, 140, 125, 89 mm. long; primaries 3, 4, 

 5, 9, and 10 growing; first-winter secondaries 3-5, 83, 34, 10 mm. long; capital 

 tract juvenal; first-winter sheaths present on cervical region and scapular tract; 

 posterior dorsal region with first-winter feathers except posteriorly; no replace- 

 ment in caudal tract; first-winter feathers visible on ventral tract from between 

 cervical apteria to anterodorsal sternal region and to femoral tract; some first- 

 winter sheaths hidden in juvenal feathers on midline anteriorly but not 

 posteriorly. 



No. 30495 KU. Male. Primary replacement same as in male seventy-five 

 days old. First-winter primaries 1-7, 112, 118, 118, 130, 111, 66, 10 mm. long; 

 juvenal primaries 8-10, 127, 136, 114 mm. long; primaries 5, 6, 7, 9 and 10 

 growing; secondary 1 juvenal and 83 mm. long; secondary 2 missing; first- 

 winter secondaries 3-9, 113, 116, 83, 65, 53, 36, 21 mm. long; secondaries 5-9 

 growing; greater primary coverts 1-7 replaced; greater secondary coverts all 

 replaced, grading in condition of growth from fully grown distally to un- 

 sheathed at tip only proximally; under primary and secondary coverts present 

 as sheaths; capital tract and anterior cervical region all juvenal, otherwise 

 spinal tract with first-winter feathers throughout; two central rectrices missing 

 (thought to be accidental); first-winter stemals meet at midline anteriorly 

 but not posteriorly; abdominals, crurals and pedals juvenal. 



No. 30489 KU. Male. Primary replacement same as in female eighty-two 

 days old. First-winter primaries 1-7, 114, 116, 120, 140, 164, 150, 90 mm. long; 

 primary 8 missing; juvenal primaries 9-10, 161 and 156 mm. long; primaries 

 6-7 growing; secondary 1 missing; first-winter secondaries 2-13, 117, 110, 



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