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Table 1 Differences in return rates of semi-collared flycatchers between 2014 and 2015, and between control group and geolocator-tagged group

From: Cold spell en route delays spring arrival and decreases apparent survival in a long-distance migratory songbird

  2014 2015 χ2 p value
Control
 Males 58.8% (30/51) 23.8% (19/80) 6.29 0.01
 Females 38.1% (24/63) 21.7% (15/69) 1.78 0.18
 2cy 64.3% (18/28) 51.4% (19/37)  0.11 0.74
 2cy+ 41.9% (36/86) 13.4% (15/112) 10.90 <0.001
 Total 47.4% (54/114) 22.8% (34/149) 7.87 0.005
Tagged
 Males 47.1% (8/17) 18.5% (5/27) 1.31 0.25
 Females 13.0% (3/23) 9.1% (2/22) 1.4e−30 1
 2cy 37.5% (6/16) 21.4% (3/14) 0.11 0.75
 2cy+ 20.8% (5/24) 11.4% (4/35) 0.23 0.63
 Total 27.5% (11/40) 14.3% (7/49) 0.99 0.32
  Control Tagged χ2 p value
2014–2015
 Males 37.4% (49/131) 29.5% (13/44) 0.24 0.63
 Females 29.5% (39/132) 11.1% (5/45) 3.22 0.07
 2cy 56.9% (37/65) 30.0% (9/30) 1.68 0.20
 2cy+ 25.8% (51/198) 15.3% (9/59) 1.39 0.24
 Total 33.5% (88/263) 20.2% (18/89) 2.69 0.10
  1. Significant differences are given in italics