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  * indicates author was an undergraduate advisee

---- 2018 ----

38. Freeman BG, MN Scholer & JW Fitzpatric. In press. Climate change causes mountaintop extirpations in a tropical bird community. Proceedings of the National Academy of Sciences. link

37. Freeman BG, JA Lee-Yaw, J Sunday & AL Hargreaves. Expanding, shifting and shrinking: The impact of global warming on species' elevational distributions. Global Ecology and Biogeography. link

36. Gulson-Castillo ER*, HF Greeney & BG Freeman. Cooperative misdirection: a probable anti-nest predation behavior that is widespread in Neotropical birds. Wilson Journal of Ornithology. link

35. Freeman BG & ET Miller. Why do crows attack ravens? The roles of predation threat, resource competition, and social behavior. The Auk: Ornithological Advances 135: 857-867. link

34. Freeman BG & BM Beehler. Limited support for the "abundant centre" hypothesis in birds along a tropical elevational gradient: implications for the fate of lowland tropical species in a warmer future. Journal of Biogeography 45: 1884-1895. link

33. Montgomery, GA* & BG Freeman. Cooperative breeding at a nest of the Silvery-throated Jay (Cyanolyca argenticula). Wilson Journal of Ornithology 130: 543-547.

32. Van Doren, BM*, BG Freeman, N Aristizabal, M Alvarez-R, J Perez-Eman, AM Cuervo & GA Bravo. Species limits in the Rusty-breasted Antpitta (Grallaricula ferrugineipectus) complex. Wilson Journal of Ornithology 130: 152-167. link

---- 2017 ----

31. Freeman BG & GA Montgomery*. Using song playback experiments to measure species recognition between allopatric populations in Neotropical passerine birds: a comparison with acoustic trait analyses. The Auk: Ornithological Advances 134: 857-870. link

30. Freeman BG, GA Montgomery* & D Schluter. Evolution and plasticity: Divergence of song discrimination is faster in birds with innate song than in song leaners. Evolution 71: 2230-2242. link

29. Freeman B. Little evidence for Bergmann's rule body size clines along tropical elevational gradients. Journal of Biogeography 44: 502-510. link

---- 2016 ----

28. Crisologo T*, R Rumelt*, E Sibbald* & B Freeman. Observations on a secondary cavity nest of Yellow-crowned Euphonia Euphonia luteicapillaCotinga 38: 79-81. 

27. Freeman B, AM Class Freeman & W Hochachka. Asymmetric interspecific aggression in New Guinean songbirds that replace one another along an elevational gradient. Ibis 158: 726-737. link

26. Freeman B. Thermal tolerances to cold do not predict upper elevational limits in New Guinean montane birds. Diversity and Distributions 22: 309-317. link

25. Freeman B & G Montgomery*. Interspecific aggression by Swainson’s Thrush (Catharus ustulatus) may limit the distribution of the threatened Bicknell’s Thrush (Catharus bicknelli) in the Adirondack Mountains. The Condor: Ornithological Applications 118: 169-178. link                                                                                                                                                                         -- Press coverage: ScienceDaily

24. Freeman B. 2015. Strong asymmetric interspecific aggression between two sympatric New Guinean robins. Ibis 158: 75-81. link

---- 2015 ----

23. Pegan TM*, RB Rumelt*, SA Dzielski*, MM Ferraro*, LE Flesher*, NE Young*, A Class Freeman & B Freeman. 2015. Asymmetric response of Costa Rican White-breasted Wood-Wrens (Henicorhina leucosticta) to vocalizations from allopatric populations. PLoS ONE 10(12): e0144949. link                                                                                                                                                   -- Press coverage: AllAboutBirds

22. Freeman B. 2015. Competitive Interactions upon Secondary Contact Drive Elevational Divergence in Tropical Birds. The American Naturalist 186: 470-479. link

21. Freeman B & NA Mason. 2015. The Geographic Distribution of a Tropical Montane Bird is Limited by a Tree: Acorn Woodpeckers (Melanerpes formicivorus) and Colombian Oaks (Quercus humboldtii) in the Northern Andes. PLoS ONE 10: e0128675. link

20. Boyce A#, B Freeman#, AE Mitchell & T Martin. 2015. Clutch size declines with elevation in tropical birds. The Auk: Ornithological Advances 132: 424-432.  link                                                                                                                                                    #these authors contributed equally to this work

      ---- 2014 ----

19. Freeman B & NA Mason. 2014. New Guinean birds have globally small clutch sizes. Emu - Austral Ornithology 114: 304-308. link

18. Freeman B & AM Class Freeman. 2014. Reply to Rehm: Why rates of upslope shifts in tropical species vary is an open question. PNAS 111: E1677. link

17. Freeman B & AM Class Freeman. 2014. Rapid upslope shifts in New Guinean birds illustrate strong distributional responses of tropical montane species to global warming. PNAS 111: 4490-4494. link                                                                           -- Accompanying article by J. Diamond: "Birds and grapes on mountaintops." link                                                                                 -- Press coverage: Liberty Voice, Phys.Org,, Cornell Chronicle, Cornell Daily Sun

16. Freeman B & AM Class Freeman. 2014. The avifauna of Mt. Karimui, Chimbu Province, Papua New Guinea, including evidence for long-term population dynamics in undisturbed tropical forest. Bulletin of the British Ornithologists' Club 134: 30-51. link

15. Freeman B 2014. Sexual niche partitioning in two species of New Guinean Pachycephala whistlers. Journal of Field Ornithology 85: 23-30. link

      ---- 2008 - 2013 ----

14. Freeman B, AM Class, J Mandeville, S Tomassi & B Beehler. 2013. Ornithological survey of the mountains of the Huon Peninsula, Papua New Guinea. Bulletin of the British Ornithologists' Club 133: 4-18. link

13. Freeman B, AM Class, CA Olaciregui & E Botero-Delgadillo. 2012. Breeding biology of the Blue-naped Chlorophonia (Chlorophonia cyanea) on Santa Marta Mountain. Ornitología Colombiana 12: 10-16. link

12. Freeman B & JA Arango. 2012. The nest and egg of the Empress Brilliant (Heliodoxa imperatrix) in Western Colombia. Boletín SAO 20: 67-71. link

11. Freeman B, SL Hilty, D Calderón-F, T Ellery & LE Urueña. 2012. New and noteworthy bird records from central and northern Colombia. Cotinga 34: 5-16. link

10. Greeney HF, PR. Martin, RA Gelis, A Solano-Ugalde, F Bonier, B Freeman & ET Miller. 2011. Notes on the breeding of high Andean birds in northern Ecuador. Bulletin of the British Ornithologists’ Club 131: 24-31.

9. Greeney HF, Suson B, Gelis RA, Freeman B & ET Miller. 2011. The nest and eggs of Yellow-throated Bush Tanager Chlorospingus flavigularis. Cotinga 33: 83-84. link

8. Freeman B & JA Arango. 2010. The nest of the Gold-ringed Tanager (Bangsia aureocincta), a Colombian endemic. Ornitología Colombiana 9: 71-75. link

7. Jahn AE, DJ Levey, IP Farias, AM Mamani, Q Vidoz & B Freeman. 2010.  Morphological and genetic variation between migratory and non-migratory Tropical Kingbirds during spring migration in central South America. Wilson Journal of Ornithology 122: 236-243.

6. Freeman B & CJ Rojas. 2010. The nest and egg of Cinnamon Screech-Owl Megascops petersoni in central Colombia. Cotinga 32: 107. link

5. Freeman B & HF Greeney. 2009. Parental care of the Black-capped Tanager (Tangara heinei) in northeastern Ecuador. Boletín SAO 19(2): 32-37. link

4. Morales-Rozo A, Rodríguez Ortiz E, Cadena CD & B Freeman. 2009. Notas sobre el nido y los pichones del Abanico Colombiano Myioborus flavivertex: Parulidae. Ornitología Neotropical 20: 19-26. link

3. Freeman B & HF Greeney. 2008. Parental care of the Long-tailed Tapaculo (Scytalopus micropterus) in northeastern Ecuador. Ornitología Neotropical 19: 581-585. link

2. Freeman B & HF Greeney. 2008. First description of the nest and eggs of Sharpe’s Wren(Cinnycerthia olivascens). Ornitología Colombiana: 88-92. link

1. Greeney HF, Freeman B, Sheldon KC, Dobbs RC & RA Gelis. 2008. Notes on the nest architecture and nesting biology of Black-capped Tanager (Tangara heinei) in northeastern Ecuador. Boletín SAO 18(1).