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Positive relationships between association strength and phenotypic similarity characterize the assembly of mixed-species bird flocks worldwide.
Sridhar H, Srinivasan U, Askins RA, Canales-Delgadillo JC, Chen CC, Ewert DN, Gale GA, Goodale E, Gram WK, Hart PJ, Hobson KA, Hutto RL, Kotagama SW, Knowlton JL, Lee TM, Munn CA, Nimnuan S, Nizam BZ, Péron G, Robin VV, Rodewald AD, Rodewald PG, Thomson RL, Trivedi P, Van Wilgenburg SL, Shanker K. Sridhar H, et al. Among authors: askins ra. Am Nat. 2012 Dec;180(6):777-90. doi: 10.1086/668012. Epub 2012 Oct 30. Am Nat. 2012. PMID: 23149402