LIST OF FIGURES 



Number Title /'age 



26 Average 1'rocression of Grouse Brood Mortality on Connecticut Hill and 



Adirondack Areas as Compared with That of Chicks Hatched from 

 Wild Egcs at the Research Center 316 



27 Relationship of Number of Adult Grouse Lost to Preceding Fall Popula- 



tion Level on Connecticut Hill and Adirondack Areas — 1930-1942 320 



28 Relationship of Incidence of Grouse Remains in Great Horned Owl Pel- 



lets to Grouse Adult Mortality and to Buffer Abundance — Connecti- 

 cut Hill Area— 1930-31 to 1941-42 321 



29 Fluctuations in Buffer Populations — Connecticut Hill Area (Winter) — 



1934-1941 326 



30 Comparison of Fluctuations in Buffer Abundance and Fox Activity — Con- 



necticut Hill Area (Winter)— 1934-1941 328 



31 Tumcal Life Cycle of Parasite Involving Indirect Mode of Transmission — 



Stomach Worm (Dispharynx spiralis) 407 



32 Distribution of Townships from Which Grouse Harboring the Stomach 



Worm (Dispharynx) Have Been Collected 420 



33 Details of the Wintering Pen Built Around a Service Room 460 



34 Form Used at the Research Center for Keeping Pedigree Records 465 



35 Form Used for Keeping Records of Individual Male Birds 466 



36 Form Used for Keeping Records of Individual Female Birds 466 



37 All-Purpose Pens (Right) Provide Suitable Quarters for Breeding. Rear- 



ing AND Over-wintering Grouse. To the Left are Multiple-unit Breed- 

 ing Pens 469 



38 Appearance under the (;am)li.N(. Lvmp ok Fkriii.k vnd Inkkimtle Eggs During 



Incubation 179 



39 Progressive Moisture Loss During Incubation of Grouse Eggs 480 



10 Exterior Details of the Colony Brooder House 484 



U Feeding Schedule for Young and for \i>i i.t Gkoi sk 489 



42 Deviation from Mean of Sprim; 1'opulations on Connecticut Hii.i wd \ii- 



iRONDACK Areas— 193(1-1942 524 



43 Grouse Brood Survival Recorded on Connectki i Hh i. vnd \dirondack 



Areas— 1930-1942 528 



11 Rki.ationship of Number of Chicks Hatched to Number and Percent Sur- 



\ivi\(, at End of Summer on Connecticut Hill and Adirondack Areas 

 1930-1942 530 



45 Relationship of Adult Sihvival to Fall Population Level on Connecticut 



Hill and Adirondack Areas— 1930-1942 533 



46 Relationship of Fall Population Level to Number of Am : rs Lost on C.on- 



NECTUi T Hill and Adirondack Areas 1930-31 to 1941-42 534 



17 Kelationshii* of F\i.l I'oin i.\tion Level to Proportion of Vni i.is l.nsi on 



Connecticut Hill AMI Vdirondack Areas — 1930-31 to 1')||.I2 5:U 



18 Adult Mortality (ScpicniluT Id Sepienii>cri in Relation to the C.omposition 



OF THE FaI.I. I'oF'I I.ATION ON CONNECTICUT HiLL AND ADIRONDACK ArEAS— 



1930-31 TO I')||-I2 536 



