Table 1. Offspring sex ratio (n = 382) according to hatching sequence (Seq) in Blackbirds Turdus merula.

Data collected in the Żeromski Park (Szczecin, NW Poland) in 2005–2007 and 2016–2017 (overall 126 broods).

Seq	Females	Males	Total
1	52 (43.3%)	68 (56.7%)	120
2	62 (56.9%)	47 (43.1%)	109
3	36 (41.4%)	51 (58.6%)	87
4	30 (55.6%)	24 (44.4%)	54
5	6 (54.5%)	5 (45.5%)	11
6		1	1