Table 2. Detection of Halyomorpha halys by detector canines from dead trees in the natural landscape.

Positive indication by detector canines1	Favorable tree characteristics2	No. of trees sampled3	No. of trees verified with H. halys
Yes	Presence	2	2
Yes	Absence	9	0
No	Presence	2	0
No	Absence	48	0

¹Yes refers that canines indicated the presence of H. halys; No refers that canines indicated the absence of H. halys.

²Dead trees with the favorable characteristics (standing, DBH >19 cm, oak or locust) were identified as likely overwintering sites of H. halys based on the results from human surveyors.

³All trees indicated by canines were destructively sampled during the survey (n = 11). For trees that canines did not show positive indications (n = 176), 50 of them were randomly selected and destructively sampled after the survey.