"within-nest phenotype composition";observed;"prediction heterospecificity";"prediction intraspecific dimorphism";parabiosis;"temporary social parasitism";"permanent social parasitism" "only Rubens";7;8.20;2.08;0.00;8.41 "Rubens + Normal";9;0.58;0.09;1.16;12.20 "only Normal";42;49.22;55.84;56.84;37.39 "Fisher’s p";;0.017;0.0004;0.0001;0.659 "X², p";;"8.07, 0.018";"13.4, 0.001";"15.28, 0.0001";"0.88, 0.547"