Bourne, G. R. 1974 ms. Whistling Duck foraging and food habits during autumn 

 rice crop sowing. Rept . in files of Guyana Rice Board and Ministry of Ag- 

 riculture, Georgetown, Guyana. 



Hersloff, L. , P. N. Lehner , E. G. Bolen and M. K. Rylander. 1974. Visual 

 sensitivity in the Black-bellied Tree Duck, a crepuscular species. J. 

 Comp. Physiol. Psychol. 86: 486-492. 



Rylander, M. K. and E. G. Bolen. 1974a. Feeding adaptations in Whistling- 

 Ducks ( Dendrocygna ) . Auk 91: 86-94. 



. 1974b. Analysis and comparison of gaits in Whistling Ducks ( Dendro - 

 cygna ). Wilson Bull. 86: 237-245. 



1973 



Bolen, E. G. and M. K. Rylander. 1973. Copulatory behavior in Dendrocygna . 

 Southwest. Nat. 18: 348-350. 



Cain, B. W. 1973. Effect of temperature on energy requirements and northward 

 distribution of the Black-bellied Tree Duck. Wilson Bull. 85: 308-317. 



1972 



Cain, B. W. 1972a. Biogenetics of Black-bellied Tree Ducks in relation to 

 their growth and distribution. Ph.D. thesis, Univ. Ill./Urbana, IL. 

 64 pp. 



. 1972b. Cold hardiness and the development of homeothermy in young 



Black-bellied Tree Ducks. Wilson Bull. 84: 483-485. 



1971 



Bolen, E. G. 1971. Pair bond tenure in Black-bellied Tree ducks. J. Wildl. 

 Manage. 35: 385-388. 



Johnson, A. R. and J. C. Barlow. 1971. Notes on the nesting of the Black- 

 bellied Tree Duck near Phoenix, Arizona. Southwest. Nat. 15: 394-395. 



1970 



Bolen, E. G. 1970. Sex ratios in the Black-bellied Tree Duck. J. Wildl. 

 Manage. 34: 68-73. 



Bolen, E. G. and J. J. Beecham. 1970. Notes on the foods of juvenile Black- 

 bellied Tree Ducks. Wilson Bull. 82: 325-326. 



Cain, B. W. 1970. Growth and plumage development of the Black-bellied Tree 

 Duck Dendrocygna autumnalis (Linnaeus). Texas A&I Univ. Stud. 3: 25-48. 



Rylander, M. K. and E. G. Bolen. 1970. Ecological and anatomical adaptations 

 of North American Tree Ducks. Auk 87: 72-90. 



35 



