2019 Broomfield Bald Eagle Watch Data Sheet
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1 2019 Broomfield Bald Eagle Watch Data Sheet Site Code Date Start Time End Time Observer Observation Pt. Sky Code Number of adult Bald Eagles detected 2 SL 3/7/2019 8:20 12:20 NHH A FH Number of nestlings detected 0 Noise Start n/a End 55.8 Temp (F) Number of fledglings detected 0 Behaviors A P- Perched 1. (A) NI - Nest Incubating (L) NB - Nest Brooding (1) NC - Nest Const/Maint. (D) FS - Feeding Self (C ) FY - Feeding Young (M ) PR - Preening (B) BR - Branching FL - Fledging SL - Sleeping (E ) AI - Aggressive Interact. (F) Fly - to/from Nest/Perch (7) TE- Territory Flight (8) NV - Not Visible (9) C - Courtship (G) Cop - Copulate (H) Disturbance Indicators (DI) 1 Staring Intently 2 Raised hackles 3 Alert posture 4 Distress calls 2 (three distinctive calls of nesting birds in response to humans) a. chatter call à 3-4 intro notes w/ short gasps of silence (<1s) followed by rapid sequence of descending notes, usually 6-9 notes (kwit kwit kwit kwit kee-kee-kee-kee-kee) b. 5 Flushing c. wails (rare) 6* Standing over their eggs (For an extended period > 10 min. notify super; > 20 minutes Stop Work) 7* Standing on the side of nest (For an extended period > 10 min notify super; > 20 minutes Stop Work) 8* Absence from the nest for an extended period 9 Direct flight toward construction, particularly if vocalizing while flying 10 Vocalization during flight in the vicinity of construction 2. Any distress call must be investigated to determine cause and any construction or human activity that may be responsible for the distress call, must be halted or modified immediately. "peal high-pitched, prolonged, gull-like cry, repeated 3-5 times *. Applies to incubation /brooding periods - once chicks hatch standing in or on the side of the nest is normal. Absence from nest also common A. The alpha-numeric codes in parenthesis correspond to FRNBES behavior codes Please include additional notes and comments below: No eagles were visible upon arrival at Del Corso Park due to heavy fog obscuring the view of the nest. At approximately 8:53 am the fog lightened and an adult (A1) was located in the nest in an incubation posture. The second adult (A2) was observed landing in the nest tree at approximately 9:15am. An adult was present in the nest and incubating the eggs for the duration of the visit. Two nest exchanges were observed throughout the observation period. Egg turning was also observed. Construction consisted of framing, hammering, drilling, and back up alarms in zones A, B, and C along with grading and earth moving in the northwest of Zone A. A rail vehicle also went by along the railway. Construction occurred throughout the site visit, no disturbance indicators were observed. Construction consisted of framing, hammering, drilling, and back up alarms in zones A, B, and C along with grading and earth moving in the northwest of Zone A. A rail vehicle also went by along the railway. Construction occurred throughout the site visit, no disturbance indicators were observed.
2 Plumage Y - Young JU - Juvenile SU- Sub Adult AD- Adult Eagle ID Examples A1 - Adult 1 A2 - Adult 2 Y1 - First Eaglet Y2 - Second Eaglet Y3- Third Eaglet Sky Codes Wind Codes Speed (mph) CL Clear 0 0 PC Partly Cloudy OC Overcast DR Drizzle RA Rain SN Snow SL Sleet/hail FH Fog/Haze Whole trees in motion Used as a back-up to anemometer Smoke rises vertically Wind direction visible in smoke Wind felt on face, leaves rustle Leaves and smaller twigs in constant motion Small branches sway Smaller trees sway Large branches in motion Description Photo (s) An adult incubating in the nest under heavy fog. An adult incubating in the nest after the fog had lightened.
3 Time (Continu ous) min. obs. Behavior Disturbance 3 Notes /comments/loc 2. Wind A1 A2 Y1 Y2 Y3 Type DI Spd. Dir. 820 Constr. 0 Heavy fog obscuring view, no eagles visible. 3.5 W 823 Constr Constr Constr Constr Constr Constr Constr Constr Constr Constr NI Constr NI Constr W 859 NI Constr NI Constr NI Constr NI Constr NI Constr NI Constr NI P2 Constr NI P2 Constr NI P2 Constr W 923 NI P2 Constr NI P2 Constr NI P2 Constr NI P2 Constr NI P2 Constr NI P2 Constr NI P2 Constr. Mark disturbance on BBC property on attached map (Figure 2) Disturbance Type includes: construction, highway/traffic, train, aircraft, pedestrians, horseback riders, other A1 located in the nest, incubating. A1 still incubating, heard vocalizing briefly. A1 incubatin. A1 incubating, A2 observed and it landed in nest tree. A1 incubating, A2 perched in nest tree. Perch type = 1. On nest; 2. In nest tree (outside of nest); 3. < 50 m. outside of nest tree; 4. > m from nest; m. from nest: 6. >1k from nest. mark locations
4 Time (Continu ous) 3 min. obs. Behavior Disturbance 3 Notes /comments/loc 2. A1 A2 Y1 Y2 Y3 Type DI Spd. Dir. 944 NI P2 Constr NI P2 Constr NI P2 Constr P3 P2 Constr P3 NI Constr. 0 A1 in Perch A, A2 incubating the nest. 2.5 W 953 P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr Fly NI Constr Fly NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr Fly NI Constr P2 NI Constr. 0 A1 landed in nest tree, A2 observed turning eggs 5.2 W 1050 P2 NI Constr P2 NI Constr P2 NI Constr P2 NI Constr P2 NI Constr. 0 A1 incubating, A2 in nest tree. Nest exchange, A1 flew to Perch A. A1 flying south towards rock creek. A1 flying north towards nest area. A1 landed in Perch A. A1 flew from Perch A. A2 incubating, A1 in the nest tree. Wind
5 Time (Continu ous) 3 min. obs. Behavior Disturbance 3 Notes /comments/loc 2. A1 A2 Y1 Y2 Y3 Type DI Spd. Dir P2 NI Constr P2 NI Constr P2 NI Constr P2 NI Rail Vehicle P2 NI Constr P2 NI Constr P2 NI Constr P2 NI Constr W 1123 P2 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr P3 NI Constr Fly NI Constr Fly NI Constr P2 NI Constr P2 NI Constr P2 NI Constr P2 NI Constr P2 NI Constr NI P2 Constr. 0 Nest exchange, A1 now incubating, A2 in nest tree. 3.6 W 1159 NI P3 Constr NI Fly Constr NI NV Constr NI Constr NI Constr NI Constr NI Constr NI Constr. 0 A2 incubating, A1 in the nest tree. A1 preening. Rail vehicle passed, no change. A1 flew to Perch A. A1 and A2 vocalizing at red tailed hawk. A1 flying south towards Rock Creek. A1 still in flight. A1 flew back and landed in nest tree, A2 still incubating. A2 moved to Perch A. A2 fly south and out of sight. A1 incubating, A2 out of sight. A1 incubating NI Constr W Wind
6 Path: P:\6900 Projects\6950 Broomfield Eagle Evaluation\Maps\6950 Figure 1 Perches.mxd Northwest Parkway Stearns Perch B Stearns Perch H Stearns Nest [b Stearns Perch A A B Stearns Perch E Stearns Perch D Carbon Road C Stearns Perch G (Western Rock Creek) Stearns Perch C D Stearns Perch F Location Broomfield Eagle Evaluation Sections 21,22, 27, and 28, T1S, R69W; 6th PM UTM NAD 83: Zone 13N; xxxxxxme, xxxxxxxmn Longitude xxx.xxxxxx W, Latitude xx.xxxxxx N USGS Lafayette, CO Quadrangle City and County of Broomfield and Boulder County, Colorado Image Source: DigitalGlobe October 10, 2017 Observation Point Feet ± Figure 1 Observation Points and Common Perch Locations Prepared for: City of Broomfield Open Space and Trails File: 6950 Figure 1 Perches.mxd (WH) November 21, 2018 Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright 2016 ESRI and its licensors. All rights reserved.
7 Path: P:\6900 Projects\6950 Broomfield Eagle Evaluation\Maps\6950 Figure 2.mxd BNSF Railroad Northwest Parkway Zone C Zone A Via Varra [b Zone B Project Access Point Broomfield Eagle Evaluation [b Nest Location Disturbance Zone Boundary Figure 2 Disturbance Zones within BBC Construction Site Image Source: DigitalGlobe October 10, Feet ± Prepared for: City of Broomfield Open Space and Trails File: 6950 Figure 2.mxd (WH) November 15, 2018 Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright 2016 ESRI and its licensors. All rights reserved.
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