Forestry for Maine Birds
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Forestry for Maine Birds A Guidebook for F oresters Managing Woodlots “With Birds in M ind” INTRODUCTION TO FORESTRY FOR MAINE BIRDS i ©2017 Maine Audubon Maine Audubon works to conserve Maine’s wildlife and wildlife habitat by engaging people of all ages in education, conservation and action. For more information, visit maineaudubon.org. AUTHORS/EDITORS: Susan Gallo, Maine Audubon, [email protected] Rob Bryan, Forest Synthesis, [email protected] Amanda Mahaffey, Forest Stewards Guild, [email protected] Rick Morrill, Northern Forest Conservation Services, [email protected] Dawn Morgan, Northern Forest Conservation Services, [email protected] Andrew Shultz, Maine Forest Service, [email protected] Sally Stockwell, Maine Audubon, [email protected] Joe Wiley, Department of Inland Fisheries and Wildlife, [email protected] Funding for this guidebook was provided by Toyota TogetherGreen. II100% INTRODUCTIONPCW & FSC logos TO FORESTRY FOR MAINE BIRDS Forestry for Maine Birds A Guidebook for F oresters Managing Woodlots “With Birds in M ind” Acknowledgements Thanks to the many foresters and other professionals who hosted and attended FFMB workshops and advisory meetings. Your invaluable feedback on this guidebook helped make it a more meaningful and useful tool for the stewardship of Maine’s forests “with birds in mind.” Cover and interior design by Eric Hoffsten / Eerowen Design; with assistance from Brandi Sladek, Maine Audubon. Graphics and illustrations provided by Dawn Morgan and Rick Morrill, Northern Forest Conservation Services. Forest Habitat Association maps provided by Andy Cutko, Maine Natural Areas Program. Photos (detailed credits on last page) provided by project partners as well as by dozens of generous Flickr photographers. Thank you for your donations of amazing photos! INTRODUCTION TO FORESTRY FOR MAINE BIRDS V VI INTRODUCTION TO FORESTRY FOR MAINE BIRDS Forestry for Maine Birds A FORESTER’S GUIDE Table of Contents Section I Introduction to Forestry for Maine Birds . 3 Section II Maine’s Priority Forest Birds . 6 Forest Birds Need Food, Cover, Places to Nest and Room to Breed . 6 Priority Birds for Conservation . 7 Threats to FFMB Priority Birds. 9 Habitat Conversion. 9 Fragmentation . 9 Acid Rain and Mercury . 9 Climate Change . 10 Balance of Age Classes . 10 Species Information Pages . .14 Scarlet Tanager . .16 Ovenbird . .17 Wood Thrush . .18 Northern Flicker . 19 Chestnut-sided Warbler . 20 Mourning Warbler . .21 Veery . 22 Yellow-bellied Sapsucker . 23 American Woodcock . .24 Eastern Wood-Pewee . .25 Canada Warbler . .26 Black-throated Blue Warbler . 27 Bay-breasted Warbler . .28 Northern Parula . 29 Black-throated Green Warbler . 30 Blackburnian Warbler. .31 Magnolia Warbler. .32 Black-backed Woodpecker . .33 Boreal Chickadee . .34 Olive-sided Flycatcher . .35 Section III Maine’s Forest Bird Habitat . .36 Overview . .36 Forest Habitat Associations and Forest Types . 39 Northern Hardwood. 40 Northern Mixedwood . 42 Northern Softwood . .44 Oak-Pine . .46 Forest Habitat Structures Important to Priority FFMB Species . 48 Vegetation Layers and Cover . 50 Stand Age, Tree Size and Structural Complexity . 52 Standing Dead and Dying Wood . .57 Dead Woody Material . 58 Deciduous Leaf Litter. .59 Native Biodiversity . 60 Invasive Exotic Plants . 60 Invasive Exotic Animals . 61 Riparian and Wetland Forests . .62 Landscape Context . .64 Section IV Forestry for Maine Birds Habitat Assessment . .66 Overview . .66 Stand Assessment . 66 Property Assessment . .71 Landscape Assessment. .72 Section V Managing Forests with Birds in Mind. .76 A Trail Map for FFMB Management and Planning . .76 Silvicultural Systems and Forest Bird Management . .78 Multi-aged (Uneven-Aged) Silvicultural Systems . .78 Even-aged Silvicultural Systems. 80 Forest Age Composition. .82 A Bird’s Eye View of Small vs. Large Ownerships . .85 Forest Block Size and Shape . .86 Landscape Context . .87 Managing Large Blocks of Forest for Canada Lynx and American Marten . 89 Case Study . 90 Stand-scale Management for FFMB Species . .92 Current and Future Condition of Vegetation Layers . .93 Softwood Inclusions within Hardwood Stand . 94 Canopy Gaps . .95 Snags and Cavity Trees . 95 Coarse and Fine Woody Material . .96 Deciduous Leaf Litter. .97 Riparian and Wetland Forests . .97 Insects and Diseases . .98 Invasive Exotic Plants . .98 Summary of FFMB Management Strategies . 100 Northern Hardwood Summary Table . .102 Northern Mixedwoods Summary Table . .104 Northern Softwoods Summary Table . 106 Oak-Pine Summary Table . 108 Appendices . .110 I. Introduction to Forestry for Maine Birds orestry for Maine Birds offers a thrushes hide in dense vegetation, new approach to integrating though their resounding flute-like bird conservation with forest songs give their location away. The management and planning. Maine woods literally fill with FForestry for Maine Birds: more than 90 different species of • improves habitat for priority birds, many here for just three forest birds and a variety of other short months to do one thing: wildlife species make baby birds. Lots and lots of • engages woodland owners in baby birds. forest stewardship Maine forests are, in fact, • works with other forest manage- baby bird factories. They provide ment goals, and a variety of habitats* or places • enhances the value and enjoy- where animals find what they need ment of Maine woodlands for to survive, including food, water, many generations to come. cover, and a place to raise young. For birds, long days, abundant WHY IS MAINE SO food, and a variety of places to IMPORTANT TO BIRDS? build nests, hide from predators, Every spring, the Maine woods and feed their young make the come alive with color and song. Maine woods an ideal place to Bright warblers return from points raise baby birds. far south to sparkle like jewels in the trees. Sturdy woodpeckers and WHAT IS THE PROBLEM? hardy chickadees that stay in Maine Populations of many forest all winter look for nesting cavities birds have been steadily declining in dead or rotting trees. Stealthy in recent decades, as threats con- *Most technical terms are in bold italics and are included in the glossary (Appendix A, p. 110). INTRODUCTION TO FORESTRY FOR MAINE BIRDS 3 tinue to grow. Habitat fragmen- That is where Forestry for tation, development, chemical Maine Birds (FFMB) comes in. A contamination, and air pollution principle outcome of FFMB prac- coupled with habitat loss at tices is the promotion of healthy migratory stopovers, on wintering forests with strong structural and grounds and on summer breeding age-class diversity that mimics grounds, contribute to these de- natural disturbances and the struc- clines. Climate change adds an el- tural features they create. FFMB ement of uncertainty to the future does this by encouraging foresters, as plant and animal species shift loggers, landowners, and land and move, ecological communities managers to consider the needs of change, and more intense storms forest birds when managing their change forest dynamics. forests. FFMB provides tools to assess existing habitat and to plan HOW CAN FORESTRY FOR activities that ensure a mix of habi- MAINE BIRDS HELP ME tat conditions across the landscape MANAGE WOODLANDS? over space and time. The Maine woods can play a FFMB is forestry “with birds critical role in reversing declines in mind.” Forest management for forest birds. If we can enhance and operations enhance, create, and conserve Maine’s “baby bird or conserve current and future factory,” we can increase the bird habitat while meeting other likelihood of population recovery. property objectives. Landowners Without steady production of frequently list the improvement of baby birds, any habitat improve- wildlife resources as an important ments in other parts of their range forest management goal. FFMB will be less effective. Breeding gives foresters and landowners the habitat in Maine is critical to the tools to reach that goal and create long-term success of forest birds. high-quality wildlife habitat. 4 INTRODUCTION TO FORESTRY FOR MAINE BIRDS WHO DEVELOPED FORESTRY FOR MAINE BIRDS ? While birds are FFMB is a collaborative effort of Maine Audu- the focus of FFMB, bon, the Forest Stewards Guild, the Maine Forest Service, and the Maine Department of managing forests Inland Fisheries and Wildlife. FFMB materials “with birds in mind” are adapted from Vermont’s “Foresters for also serves the needs the Birds” program, which was first devel- of many other wildlife oped in 2008 by Audubon Vermont and the Vermont Department of Forests, Parks, and species. Recreation. That program has been shared with hundreds of foresters and landowners. HOW IS THIS GUIDEBOOK FFMB also relies heavily on the concepts, for- est type descriptions, and management rec- ORGANIZED? ommendations in Focus Species Forestry, Section I: Introduction to a guidebook developed by Maine Audubon Forestry for Maine Birds to help foresters and landowners manage forests to enhance habitat for a diverse array Section II: Maine’s Priority of representative wildlife species including Forest Birds reviews the habitat amphibians, birds, and mammals. The Focus needs of 20 priority bird species Species Forestry guidebook is available at the FFMB website at maineaudubon.org/ of conservation concern in the FFMB. Northeast. These FFMB species are relatively easy to identify by sight and sound, even for those with little or no birding experience. WHO SHOULD USE THIS Section III: Maine’s Forest GUIDEBOOK? Bird Habitat reviews the major While geared to foresters, forest types found in Maine and anyone.