Old nest material functions as an informative cue in making nest-site selection decisions in the European Kestrel (Falco tinnunculus)

Table 1 Number of nest boxes and occupied boxes from 2004 to 2012

Year	No. of nests (new/old)	With nest materials							No. of occupied nests boxes
Year	No. of nests (new/old)	WNM	EKM	GTM	ERSM	ANM	SESM	OTM	No. of occupied nests boxes
2004	61 (61/0)	19	0	2	0	40	0	0	21
2005	56 (15/41)	21	11	4	5	12	0	3	16
2006	58 (8/50)	19	17	10	6	6	0	0	17
2007	74 (12/62)	30	22	11	5	3	0	3	22
2008	74 (9/65)	19	17	10	16	2	0	10	15
2009	68 (8/60)	20	12	5	15	0	9	7	11
2010	52 (12/40)	20	10	10	3	1	2	6	14
2011	33 (7/26)	14	7	0	3	1	2	6	1
2012	64 (59/5)	20	0	5	3	8	24	4	1

Nest materials were categorized into seven types based on previous breeders and manipulation treatments in the study: without nest material (WNM), old European Kestrel nest material (EKM), Great Tit nest material (GTM, both new and old), old Eurasian Red Squirrel nest material (ERSM), artificial nest material of dry leaves and branches (ANM), simulated nest material of Eurasian Red Squirrel (SESM), and other types of nest material (OTM, mainly including old Mandarin Duck and Ural Owl nest materials)

ISSN: 2053-7166