Effects of interspecific coexistence on laying date and clutch size in two closely related species of hole‐nesting birds by Møller, AP, Balbontín, J, Dhondt, AA, Remeš, V, Adriaensen, F, Biard, C, Camprodon, J, Cichoń, M, Doligez, B, Dubiec, A, Eens, M, Eeva, T, Goodenough, AE, Gosler, AG, Gustafsson, L, Heeb, P, Hinsley, SA, Jacob, S, Juškaitis, R, Laaksonen, T, Leclercq, B, Massa, B, Mazgajski, TD, Nager, RG, Nilsson, J-Å, Nilsson, SG, Norte, AC, Pinxten, R, Robles, H, Solonen, T, Sorace, A, Van Noordwijk, AJ, Lambrechts, MM