Figure 1. Monthly variation in signs of probable breeding of Iberian bullfinches in NW Spain, by direct observation. Nest building and subsequent nest attendance are excluded. Mate-feeding refers to male feeding a female. Courtship display refers to mutual dance and caressing. Twig-display refers to partners showing nest material to one another. n: total records per month. In brackets: number of records per field trip (31 field trips in March, 33 in April, 49 in May, 49 in June, 54 in July, 52 in August). Some individuals showed more than one sign uninterruptedly, thus the 114 grand total records correspond to 97 sightings. Pooled data for 2001–2006.