LIST or ILLUSTRATIONS 



Page 

 Feather Remains Indicating that an Adllt Grouse was Killed kv a H\\\k ok Owl 319 



Fox Dropping Containing Grouse Feather Remains 340 



Pellet of Great Horned Owl Showing Grouse Remains and Susceptibility to 



Disintegrating of Pellets Composed of this Sort of Material 342 



A Typical Clutch of Grouse Eggs 363 



A Nest Full of Grouse Chicks Just Hatched (several shells removed by photogra- 

 pher) 367 

 Explanatory Posters and Report Cards were Tested as a Method of Securing 



Hunter Kill Records 374 



Infestation of the Gizzard Worm (Cheilospirura spinosa) Under Gizzard Lining — 



A Relatively Harmless Parasite of Grouse 406 



A Normal Proventrici lus (right) Compared with One Infected with the Stomach 



Worm (Dispharynx spiralis) — A Relatively Harmful Parasite of Grouse 406 



Three External Parasites of the Ruffed Grouse and the Sowbug, Intermediate 



Host of the Stomach W'orm i Dis^pharynx) 414 



Some Internal Parasites of the Ruffed Grouse 425 



Bird Ticks (Haemaphysalis chordeilis) Attached to Head and Neck of Adult Grouse 431 

 Lesions of Aspergillosis in Lung and Kidney of Adult Grouse 1 in 



Field Station in the Western Catskill Mountains where the Investigation's 



First Tests of Rearing Grouse Under Semi-natural Conditions, as well as in 



Brooders, were Carried Out 448 



In this Kettle. Incubated Grouse Eggs, Buried Between Layers of Cotton, were 



Carried Successfully Over Distances up to 200 Miles 4.i2 



The Interior of a Pen Used to Raise Grouse by the Semi-natural Method vt the 



Catskill Station : 454 



Early Egyptian Incubator 15"> 



Wintering Yards AT THE Research Center Containing All-purpose Pens I'i.\( kd 



End TO End 459 



The Wired-in Wintering Pen at the Research Center 160 



The Wintering Pen is Divided into Sections in Low r.oMuis to Discourage the 



Birds FROM Chasing One Another 161 



The Service Room is Constructed with Sliding Windows and Doors that Open 



Inwards to Facilitate Catching, Feeding and Watering the Bird*; Oitside Idl 



Even Hand-Raised Grouse Seldom Make Good Mothers in Captivity 474 



"Still Air" Incubator with Turning Trays to Hold Incubating Eggs and Pedigree 



Trays into w 111(11 mi K<;(;s are Shifted Before Hatching 477 



Chicks May be Idkntiiied by Attaching a Rand to Leg or Wing Before Transfkh- 



RING THEM IROM THE I'eDK.KEK 1I\T(;11ING TrAY TO THE BkoODEK ll'.l 



Shortly After Hatching the Chicks are Placed in v i!\TTi:in Hhixidkr 1}!3 



The Colony Brooder House into which the Chicks vkk Mo\ kd khhm i hi: Umti.k^ 



Brooders when from Ten to Twelve Days t)Li) I<!1 



A Flat-Topped, Box Type Hover was Found Most SATisKvcToin iuk Hhoodim. 



Young Grouse in the (]()i.onv Rroodkr Hoisk 1}>5 



\i.i.-PuRP0SE Pens, Scattered Over the Rearing Field. Make Idem, I mt> i\ 



WHICH TO Raise the Young Grouse Transferred from the Colony Broodik 



House I'^-' 



