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 speciesFlyway regionTotal (%)
12345

Pine/conifer (multiple species)122105139 (21.8)
Maple (Acer sp.)261010037 (20.7)
Oak (Quercus sp.)44191028 (15.6)
Pecan (Carya illinoinensis)00417526 (14.5)
Willow (Salix sp.)4215214 (7.8)
Walnut (Juglans sp.)531009 (5.0)
Ash (Fraxinus sp.)340007 (3.9)
Elm (Ulmus sp.)201306 (3.4)
Hackberry (Celtis occidentalis)010405 (2.8)
Palm (type not specified)000044 (2.2)