29 
Surface of water column (includes substrates and vegetative cover at shoreline or under shallow water 
[<25 cm deep], open water [<25 cm deep], and types of vegetation extending up to or through surface 
waters) 
119 
120 
121 
122 
123 
124 
125 
126 
127 
128 
129 
130 
131 
132 
133 
134 
135 
136 
137 
Artificial (man-made) structures 
Bedrock (solid rock mass) 
Boulder (>305 mm) 
Rubble (152-305 mm) 
Cobble (64-152 mm) 
Gravel (2-64 mm) 
Sand (0.063-2 mm) 
Mud (<0.063 mm) or organic matter (detritus or sapropel) 
Aquatic bed— algae, moss, or lichen 
Rooted herbaceous vegetation 
Rooted woody vegetation 
Open water 
Floating filamentous algae (non-rooted and rooted) 
Floating non-woody vascular plants (non-rooted) 
Floating non-woody vascular plants (rooted) 
Floating woody vascular plants (non-rooted) 
Floating woody vascular plants (rooted) 
Emergent non-woody vascular plants 
Emergent woody vascular plants 
2.23 Species breeds in warmwater environments. Water temperature at time of breeding may typically be 
> 18°C, and surrounding climate is characterized with a growing season > 170 days with a mean July air 
temperature > 15°C. 
Bottom of water column (includes substrates under water columns >25 cm deep) 
138 
139 
140 
14] 
142 
143 
144 
145 
146 
Bedrock (solid rock mass) 
Boulder (>305 mm) 
Rubble (152-305 mm) 
Cobble (64-152 mm) 
Gravel (2-64 mm) 
Sand (0.063-2 mm) 
Mud (<0.063 mm) or organic matter (detritus or sapropel) 
Submerged algae or moss 
Submerged rooted vascular plants 
Water column (water > 25 cm below the surface) 
147 
148 
149 
150 
151 
152 
Little or no flow (e.g., impoundments, lakes, and ponds), shallow (<2 m) 
Little or no flow (e.g., impoundments, lakes, and ponds), deep (>2 m) 
Laminar flow (e.g., run or smooth or slow flow in a channel), shallow (<2 m) 
Laminar flow (e.g., run or smooth or slow flow in a channel), deep (>2 m) 
Turbulent flow (e.g., riffle or rapid flow in a channel), shallow (<2 m) 
Turbulent flow (e.g., riffle or rapid flow in a channel), deep (>2 m) 
Surface of water column (includes substrates and vegetative cover at shoreline or under shallow water 
[<25 cm deep], open water [<25 cm deep], and types of vegetation extending up to or through surface 
waters) 
153 
154 
155 
156 
157 
158 
159 
160 
161 
162 
Artificial (man-made) structures 
Bedrock (solid rock mass) 
Boulder (>305 mm) 
Rubble (152-305 mm) 
Cobble (64-152 mm) 
Gravel (2-64 mm) 
Sand (0.063-2 mm) 
Mud (<0.063 mm) or organic matter (detritus or sapropel) 
Aquatic bed — algae, moss, or lichen 
Rooted herbaceous vegetation 
