2019 Broomfield Bald Eagle Watch Data Sheet

Transcription

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 1/8/ :30 15:12 RDB A PC Number of nestlings detected Noise Start n/a End n/a Temp (F) Number of fledglings detected 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 "peal high-pitched, prolonged, gull-like cry, repeated 3-5 times 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. *. 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: Two adult eagles (A1 and A2) were observed perched in the nest area at beginning of observations. A1 flew to the north and disappeared from view for 81 minutes. A2 chased a subadult bald eagle from the Rock Creek area approximately 900 meters from the nest. A1 captures a prairie dog and returned to the nest tree to feed. A1 returned to the nest tree after A2 had prey, but no interaction between the eagles. Planes flying over appear to be using a flight path that is further from a direct flight over the nest than observed in the past. Construction mostly framing in Zone B with some ground crews in Zone A

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 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 Whole trees in motion Description Photo (s) Framing activity at project site Adult bald eagle feeding on prairie dog

3 Time 3 min. Behavior Disturbance 3 Notes /comments/loc 2. Wind (Continuous) obs. A1 A2 Y1 Y2 Y3 Type DI Spd. Dir.(Fr.) P2 P4 constr 0 From obs. Point C - A1 on arch at 2018 nest, A2 in perch A 8.2 N P2 P4 constr P2 P4 constr Fly P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 Plane NV P4 constr NV P4 constr N 1403 NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 Train NV P4 Train NV P4 Train NV P4 constr NV P4 constr NV P4 constr NV P4 constr NV P4 constr NW 1435 NV P4 constr 0 in overall behavior - A2 short chatter 1436 NV P4 constr 0 Mark disturbance on BBC property on attached map (Figure 2) Disturbance Type includes: construction, highway/traffic, train, aircraft, pedestrians, horseback riders, other Move to obs. Point A - in eagles from Obs. Point A - A1 flying to north and NV; A2 in perch A Plane flies over area - not directly over nest Blows horn at Dillon Road - Train ends - no apparent reaction form eagle Subadult bald eagle foraging at Rock Creek, SW of Perch C in overall behavior - A2 short chatter 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 on attached map

4 Time (Continuous) 3 min. obs. Behavior Disturbance 3 Notes /comments/loc 2. A1 A2 Y1 Y2 Y3 Type DI Spd. Dir.(fr.) 1437 NV P4 Plane NV P4 Plane NV P4 constr NV Fly constr NV AI constr NV P5 constr NV Fly constr NV Fly constr NV Fly constr NV P2 constr NV P2 constr Planes NV FS constr NV FS constr NV FS constr NV FS Plane NV FS 2 planes P1 FS constr P1 FS constr NW 1506 P1 FS constr P1 FS constr P1 P1 Train P1 P1 Train P1 P1 constr 0 Prop plane overhead - some increased head movement noticed 2nd prop plane overhead - again some increased head movement noticed A2 Flies to south A2 bumps subadult bald eagle off perch and chases A2 perches in tree SW of Perch C Flies to north low to ground Capture prairie dog from mound and flies towards nest towards nest Lands in nest tree w/ prairie dog Changes perches 2 planes fly overhead but appear o fly at greater distance from nest than past Begins to skin and feed on prairie dog continues to feed continues to feed Planes fly over with no reaction from feeding eagle A1 flies in and perches on arch above 2018 nest A2 finished feeding Train ends - no reaction from either eagle End observation - no change Wind

5 Path: P:\6900 Projects\6950 Broomfield Eagle Evaluation\Maps\6950 Figure 1 Perches.mxd Northwest Parkway ns Perch B A Stearns Perch H Stearns Nest [b Observation point 1/08/19 Stearns Perch A B Stearns Perch E A2 captures prairie dog Stearns Perch D Carbon Road C Stearns Perch C Stearns Perch G (Western Rock Creek) A2 chases subadult eagle D Stearns Perch F Location Observation Point 50 Meter Buffer 200 Meter Buffer 1000 Meter Buffer 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 ± 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) January 4, 2019 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.

6 Path: P:\6900 Projects\6950 Broomfield Eagle Evaluation\Maps\6950 Figure 2.mxd BNSF Railroad Northwest Parkway Framing in Zone B, minor ground work in Zone A Zone C Zone A Via Varra [b Zone B Project Access Point Broomfield Eagle Evaluation [b Nest Location Disturbance Zone Boundary Figure 2 Title 01/08/2018 Image Source: DigitalGlobe October 10, Feet ± Prepared for: City of Broomfield Open Space and Trails File: 6950 Figure 2.mxd (WH) November 13, 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.