| Higher-order phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative anatomy. II. Analysis and discussion BC Livezey, RL Zusi Zoological journal of the Linnean Society 149 (1), 1-95, 2007 | 685 | 2007 |
| Patterns of diversity in the avian skull RL Zusi The skull 2, 391-437, 1993 | 240 | 1993 |
| A functional and evolutionary analysis of rhynchokinesis in birds RL Zusi | 170 | 1984 |
| Structural adaptations of the head and neck in the Black Skimmer RL Zusi | 156 | 1962 |
| Higher-order phylogenetics of modern Aves based on comparative anatomy. BC Livezey, RL Zusi Netherlands Journal of Zoology 51 (2), 2001 | 147 | 2001 |
| An interprepation of skill structure in the pengiuns RL Zusi The biology of penguins, 59-84, 1975 | 105 | 1975 |
| Myology of the purple-throated carib (Eulampis jugularis) and other hummingbirds (Aves: Trochilidae) RL Zusi, GD Bentz | 97 | 1984 |
| The role of the depressor mandibulae muscle in kinesis of the avian skull RL Zusi Proceedings of the United States National Museum, 1967 | 97 | 1967 |
| Osteology and myology of the head and neck of the pied-billed grebes (Podilymbus) RL Zusi, RW Storer University of Michigan Museum of Zoology, 1969 | 84 | 1969 |
| Preliminary Field Guide to the Birds of the Indian Ocean: For Use During the International Indian Ocean Expedition GE Watson United States National Museum, Smithsonian Institution, 1963 | 61 | 1963 |
| Homology and phylogenetic implications of some enigmatic cranial features in galliform and anseriform birds RL Zusi, BC Livezey Annals of Carnegie Museum 69 (3), 157-193, 2000 | 59 | 2000 |
| Introduction to the skeleton of hummingbirds (Aves: Apodiformes, Trochilidae) in functional and phylogenetic contexts RL Zusi Ornithological Monographs 77 (1), 1-94, 2013 | 57 | 2013 |
| Variation in the os palatinum and its structural relation to the palatum osseum of birds (Aves) RL Zusi, BC Livezey Annals of Carnegie Museum 75 (3), 137-180, 2006 | 52 | 2006 |
| Variation of a muscle in hummingbirds and swifts and its systematic implications RL Zusi, B GD | 52 | 1982 |
| Infraspecific geographic variation and the subspecies concept RL Zusi The Auk 99 (3), 606-608, 1982 | 47 | 1982 |
| A Feeding Adaptation of the Jaw Articulation in New World Jays (Corvidae) RL Zusi The Auk 104 (4), 665-680, 1987 | 46 | 1987 |
| On the evolution of intraramal mandibular joints in pseudodontorns (Aves: Odontopterygia) RL Zusi, KI Warheit Papers in Avian Paleontology honoring Pierce Brodkorb. Natural History …, 1992 | 42 | 1992 |
| The systematic relationships of Aechmorhynchus, Prosobonia, and Phegornis (Charadriiformes; Charadrii) RL Zusi, JR Jehl The Auk 87 (4), 760-780, 1970 | 40 | 1970 |
| The interorbital septum in cardueline finches. RL Zusi | 33 | 1978 |
| Ecology and adaptations of the Trembler on the island of Dominica RL Zusi Living Bird 8, 137-164, 1969 | 30 | 1969 |
