Who are the innovators? A field experiment with 2 passerine species

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Innovative problem solving in wild meerkats (2012, background): “…body condition have generally been found to be unrelated to innovatory propensities (Boogert et al. 2010; Cole et al. 2011; Overington et al. 2011; Morand-Ferron et al. 2011), but as these estimates are derived from morphometric measurements taken before testing, they may not adequately reflect…”
Problem-solving performance is correlated with reproductive success in a wild bird population (2013, background): “(Morand-Ferron et al. 2011).”
Performance in cognitive and problem-solving tasks in male spotted bowerbirds does not correlate with mating success (2013, unknown): “To understand how selection pressures may be acting on cognitive traits, individual cognitive differences must be related to measures of fitness variation (Shumway 2008; Sol 2009; Morand-Ferron et al. 2011; Cole et al. 2012; Cauchard et al. 2013).”
Toward wild psychometrics: linking individual cognitive differences to fitness (2014, background): ““Problem-solving” measures in great tits are also sensitive to testing conditions: individuals’ success in captivity did not predict their success in the wild (Morand-Ferron et al. 2011).”