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Examples of seed-dispersing birds are the [[hornbill]], the [[toucan]], the [[aracari]], the [[cotinga]] (ex. [[Guianan cock-of-the-rock]]), and some species of [[parrot]]s. Frugivores are common in the [[temperate zone]], but mostly found in the [[tropics]]. Many frugivorous birds feed mainly on fruits until nesting season, when they incorporate protein-rich insects into their diet. Facultatively-baccivorous birds may also eat bitter berries, such as juniper, in months when alternative foods are scarce. In North America, red mulberry (''[[Morus rubra]]'') fruits are widely sought after by birds in spring and early summer; as many as 31 species of birds recorded visiting a fruiting tree in [[Arkansas]].<ref>{{Cite journal|last=Jackson|first=J. L., II|last2=Kannan|first2=R.|date=2018|title=Avian Frugivory in a Fruiting Mulberry Tree (''Morus rubra'') in Arkansas|url=https://scholarworks.uark.edu/cgi/viewcontent.cgi?article=3310&context=jaas|url-status=live|journal=Journal of the Arkansas Academy of Sciences|volume=72|pages=38–46|issn=2326-0491|archive-url=https://web.archive.org/web/20200503071835/https://scholarworks.uark.edu/cgi/viewcontent.cgi?article=3310&context=jaas|archive-date=May 3, 2020|via=the [[University of Arkansas]]}}</ref>
Prior to 1980, most reports of avian frugivory were made in the tropics. From 1979–1981, a number of studies recognized the importance of fruits to fall temperate assemblages of [[passerine]] migrants.<ref>{{cite journal|last1=Thompson|first1=John N.|last2=Willson|first2=Mary F.|date=September 1979|title=Evolution of Temperate Fruit/Bird Interactions: Phenological Strategies|journal=[[Evolution (journal)|Evolution]]|volume=33|issue=3|pages=973–82|doi=10.1111/j.1558-5646.1979.tb04751.x|jstor=i200133|pmid=28568428|doi-access=free}}</ref><ref>{{cite journal|last1=Stiles|first1=Edmund W.|date=1980|title=Patterns of Fruit Presentation and Seed Dispersal in Bird-Disseminated Woody Plants in the Eastern Deciduous Forest|journal=[[The American Naturalist]]|volume=116|issue=5|pages=670–88|doi=10.1086/283657|jstor=2460623}}</ref> The earliest of these field studies were conducted in the fall of 1974 in [[upstate New York]] by Robert Rybczynski & Donald K. Riker<ref>{{cite journal|last1=Rybczynski|first1=Robert|last2=Riker|first2=Donald K.|date=January 1981|title=A Temperate Species-Rich Assemblage of Migrant Frugivorous Birds|url=https://sora.unm.edu/sites/default/files/journals/auk/v098n01/p0176-p0179.pdf|url-status=live|journal=[[The Auk]]|volume=98|issue=1|pages=176–179|jstor=4085621|via=the [[University of New Mexico]]}}</ref> and separately by John W. Baird<ref>{{cite journal|last1=Baird|first1=John W.|date=March 1980|title=The Selection and Use of Fruit by Birds in an Eastern Forest|url=https://sora.unm.edu/sites/default/files/journals/wilson/v092n01/p0063-p0073.pdf|journal=[[The Wilson Bulletin]]|volume=92|issue=1|pages=63–73|jstor=4161294|via=the [[University of New Mexico]]}}</ref> in [[New Jersey]], each documenting ingestion of fruits in stands of fruit-bearing shrubs by [[mixed-species feeding flock|mixed species assemblages]] dominated by migrant [[White-throated sparrow|white-throated sparrows]].{{Cn}}
[[Mammal]]s are considered frugivorous if the seed is dispersed and able to establish. One example of a mammalian frugivore is the [[maned wolf]], or ''Chrysocyon brachyurus'', which is found in South America. A study by José Carlos Motta-Junior and Karina Martins found that the maned wolf is probably an important seed disperser. The researchers found that 22.5–54.3% of the diet was fruit.<ref name="Motta-Junior">{{Cite book|last=Motta-Junior|first=José Carlos|url=https://www.researchgate.net/publication/271706264_Seed_dispersal_and_frugivory_-_Entire_Book|title=Seed Dispersal and Frugivory: Ecology, Evolution, and Conservation|last2=Martins|first2=Karina|publisher=[[CABI Publishing]]|isbn=978-0851995250|editor-last=Levey|editor-first=Douglas J.|publication-date=February 2002|pages=291–303|chapter=The Frugivorous Diet of the Maned Wolf, ''Chrysocyon brachyurus'', in Brazil: Ecology and Conservation|lccn=2001035222|editor-last2=Silva|editor-first2=Wesley R.|editor-last3=Galetti|editor-first3=Mauro|editor-link3=Mauro Galetti|via=[[ResearchGate]]}}</ref>
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