Identifying Large- and Small-Scale Habitat Characteristics of Monarch Butterfly Migratory Roost Sites with Citizen Science Observations

Table 1

Summary of 10 most commonly reported tree types used for monarch roosts from 2005 to 2008, in all 5 flyway zones. Only observations where the roost tree type was specified are included.

Tree species	Flyway region					Total (%)
	1	2	3	4	5
Pine/conifer (multiple species)	12	21	0	5	1	39 (21.8)
Maple (Acer sp.)	26	10	1	0	0	37 (20.7)
Oak (Quercus sp.)	4	4	1	9	10	28 (15.6)
Pecan (Carya illinoinensis)	0	0	4	17	5	26 (14.5)
Willow (Salix sp.)	4	2	1	5	2	14 (7.8)
Walnut (Juglans sp.)	5	3	1	0	0	9 (5.0)
Ash (Fraxinus sp.)	3	4	0	0	0	7 (3.9)
Elm (Ulmus sp.)	2	0	1	3	0	6 (3.4)
Hackberry (Celtis occidentalis)	0	1	0	4	0	5 (2.8)
Palm (type not specified)	0	0	0	0	4	4 (2.2)