Avian Abundance in Riparian Zones of Three Forest Types in the Cascade Mountains, Oregon

Publication Type:Journal Article
Year of Publication:1996
Authors:Anthony, RG, Green, GA, Forsman, ED, S. Nelson, K
Journal:The Wilson Bulletin
Date Published:1996
ISBN Number:00435643
Keywords:Catharus, Catharus ustulatus, Certhia, Certhia americana, Certhiidae, Coccothraustes vespertinus, Dendroica, Dendroica occidentalis, Dendroica townsendi, Empidonax, Empidonax hammondii, Hesperiphona, Hesperiphona vespertina, Hylocichla, Hylocichla ustulata, Leuconotopicus villosus, Mohoua novaeseelandiae, Nannus, Nannus hiemalis, Nannus troglodytes, Paridae, Parulidae, Parus, Parus rufescens, Picidae, Picoides, Picoides villosus, Poecile, Poecile rufescens, Regulidae, Regulus, Regulus satrapa, Satrapa, Selasphorus, Selasphorus rufus, Setophaga, Setophaga occidentalis, Setophaga townsendi, Trochilidae, Troglodytes, Troglodytes hiemalis, Troglodytes troglodytes, Troglodytidae, Turdidae, Tyrannidae
Abstract:We surveyed bird populations along headwater streams of old-growth, mature, and young coniferous forests of the Oregon Cascade Mountains during summer and winter. Brown Creepers (Certhia americana), Chestnut-backed Chickadees (Parus rufescens), Golden-crowned Kinglets (Regulus satrapa), Evening Grosbeaks (Hesperiphona vespertinus), and Winter Wrens (Troglodytes troglodytes) were common in all stand types. During the summer, abundances of Brown Creepers, Hammond's Flycatchers (Empidonax hammondii), Hermit/Townsend's warblers (Dendroica occidentalis), and Chestnut-backed Chickadees were significantly higher in old-growth and mature forests compared to young forests. Species richness and densities generally were not significantly different among the stand types during winter. However, numbers of Chestnut-backed Chickadees, Evening Grosbeaks, Golden-crowned Kinglets, Hairy Woodpeckers (Picoides villosus), and Winter Wrens were much higher in the winter than in summer. Swainson's Thrushes (Catharus ustulatus) and Rufous Hummingbirds (Selasphorus rufus) were more abundant in riparian areas in this study compared to other studies in upland forests and may be riparian associates along these headwater streams.
Short Title:The Wilson Bulletin
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith