Animal Behaviour, 2006 Staff Author(s) Citation Leech, D.I., Rowe, L.V. & Hartley, I.R. 2006. Experimental evidence for adjustment of parental investment in relation to brood sex ratio in the Blue Tit. Animal Behaviour 72: 1307. doi:10.1016/j.anbehav.2006.03.017 Staff author(s) Ellie Leech