A pack of 19-29 African wild dogs (Lycaon pictus) in the Masai Mara ar
ea of Kenya was monitored during July-August 1989 to document their su
ccess in capturing various ungulate species. The pack was most success
ful killing smaller, abundant ungulate prey, and was not less successf
ul when pack size abruptly was reduced; overall hunting success (all s
pecies) was 51%. Abundant prey, low competition with other large carni
vores, and large size of pack confound conjecture concerning the evolu
tion of pack size.