Long-term study reveals central European aerial insectivores as an unusual group of hosts that harbor mostly helminths that are unable to complete life-cycles in the nesting quarters of their hosts

Table 1 Numbers of host individuals that were examined in the present study and their distribution within individual decades

Species	Study period, number of individuals
Species	1963–1980	1981–1990	1991–2000	2001–2010	2011–2020	2021–2022
Apus apus	7	17	62	69	98	8
Hirundo rustica	73	19	49	234	66	6
Delichon urbicum	53	17	9	29	43	0
Riparia riparia	4	55	47	75	5	0
Ficedula albicollis	0	4	19	46	16	2

ISSN: 1756-3305