Adaptation or ecological trap? Altered nest-site selection by Reed Parrotbills after an extreme flood

Table 1 Comparison of Reed Parrotbill nest-site characteristics before and after a flooding event

	Variable	Before flood	n	After flood	n	Statistics	df	p
Nest landscape	Distance to road (m)	24.44 ± 12.05	18	22.46 ± 7.96	13	0.516¹	29	0.610
	Distance to reed edge (m)	11.39 ± 7.82	18	9.92 ± 6.78	13	0.544¹	29	0.591
	Distance to water edge (m)	13.28 ± 10.59	18	12.31 ± 11.08	13	0.247¹	29	0.807
	Distance to perch (m)	31.72 ± 14.96	18	36.54 ± 21.87	13	− 0.686²	19.88	0.500
Nest-site micro-habitat	Vegetation cover (%)	15.59 ± 18.28	17	26.92 ± 18.99	13	− 1.655¹	28	0.109
	Nest height (m)	0.76 ± 0.26	18	1.17 ± 0.13	13	− 5.852²	26.69	< 0.001**
	Reed height above nest (m)	1.41 ± 0.29	18	1.07 ± 0.39	11	2.649¹	27	0.013*
	Water depth (m)	0.22 ± 0.18	12	0.18 ± 0.13	13	0.787¹	23	0.440
	Number of reed stem	251 ± 55.82	16	231.69 ± 97.77	13	− 0.374³	–	0.709
	Height of reed (m)	2.16 ± 0.20	18	2.26 ± 0.38	11	− 0.872¹	27	0.391
	Number of reed stem for nest	5.06 ± 1.39	16	4.33 ± 0.89	12	− 1.506³	–	0.132
Nest characteristics	Nest diameter (cm)	8.15 ± 1.26	17	7.96 ± 0.96	12	− 0.474³	–	0.635
	Nest depth (cm)	8.76 ± 1.58	17	9.88 ± 1.00	12	− 2.140¹	27	0.042*
	Nest volume (cm³)	322.13 ± 172.28	17	335.66 ± 107.80	12	− 0.754³	–	0.451
	Nest cup diameter (cm)	5.38 ± 0.52	17	5.17 ± 0.49	12	− 1.157³	–	0.247
	Nest cup depth (cm)	4.82 ± 0.53	17	5.42 ± 0.56	12	− 2.636³	–	0.008**
	Nest cup volume (cm³)	73.89 ± 16.82	17	76.64 ± 19.30	12	− 0.445³	–	0.656

ISSN: 2053-7166