“His 170 publications dealt mainly with the taxonomy, zoogeography, and evolution of birds, but also with territory theory and brood parasitism.”

“The study of zoogeography attempts to answer questions about how and why fish faunas differ across geographic regions.”

“Howell's other main focus of research was on the zoogeography and geographic distribution of birds in Central America, particularly Nicaragua.”

“For me, an evolutionary biologist and zoogeographer, each expedition results in intriguing discoveries of the abundance, presence and absence of species.”

“The accumulated data base provides invaluable information for ecologists and zoogeographers.”

“The theories of animal distribution advanced by zoogeographers are usually grounded in evolutionary presuppositions.”

“Although many zoogeographers no longer consider the Wallace Line to be a regional boundary, it does represent an abrupt limit of distribution for many major animal groups.”