TERF05 (tracked 2/14/18-6/12/18)

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TERF05 (tracked 2/14/18-6/12/18)

Post by gemini » Mon Feb 19, 2018 10:17 pm

Opening up this topic to track TERF05's coming's and going's. Comments/observations welcome!

Link to TERF05's Tracking Map

TERF05
Banding Date: Feb 14, 2018
Banded: Blue auxiliary marker G over 3 on its left leg –
Captured: Vancouver Landfill in Delta
Age: 2yr 10m
Eye color: Light brown
Sex: F


David Hancock and Mike Seear banding TERF05
20180214_TERF05-dh+ms.jpg

TERF05's bands:
20180214_TERF05-leg-band.jpg

A closeup:
TERF05_20180214_CAN_8076.jpg
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Re: Live Tracking - Comments

Post by gemini » Thu Jun 07, 2018 2:43 am

TERF05 seems to have stalled! No progress since May 5. Hope all is okay!
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Re: Live Tracking - Comments

Post by gemini » Sat Jun 09, 2018 1:20 am

TERF05 checked in later on June 7 - all is well! She appears to be sticking to the same area!
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Re: Live Tracking - Comments

Post by gemini » Fri Jun 22, 2018 1:48 pm

When TERF05 set out did she find this area by herself? or was she following other more travelled eagles? (All maps click bigger)
terf05 map.jpg
Looks like this young lady - not content to hang around Great Slave Lake - is searching out different lakes in the surrounding area
Terf05 map1.jpg
but ultimately ends up returning to one spot - could this white spot on the map possibly be a dump? She hasn't moved from where she is now since the 12th of June. (See next post)
Terf05 map2.jpg
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Re: Live Tracking - Comments

Post by gemini » Fri Jun 22, 2018 1:51 pm

Google earth helped me pinpoint exactly where Terf05 is hanging out - just southwest of the town of Hay River!
Dump 1.jpg
And after zoning in on the "white area" on the Map Terf05 keeps returning to it looks like it is most likely a dump! But then are we surprised by that?
dump 2.jpg
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Re: Live Tracking - Comments

Post by gemini » Mon Jun 25, 2018 12:37 pm

As of June 25, 2018, it appears that TERF05 has remained in the same spot since June 11, just a short distance from what looks like could be a dump! Perhaps she has found a friend?? (click 2x for bigger)
TERF05 MAP2 6-25-2018.jpg
A closer view of the map
TERF05 map 6-25-2018.jpg
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Re: Live Tracking - Comments

Post by gemini » Tue Jul 03, 2018 3:09 am

July 2, TERF05 is still in the same area. Been there since June 11 - wonder what is so attractive there! She sure doesn't seem to want to go anywhere else!
TERF05 - 7-2-2018  - 1.jpg
TERF05 - 7-2-2018  - 2.jpg
TERFO5 - 7-2-2018  - 3.jpg
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Re: Live Tracking - Comments

Post by gemini » Mon Jul 09, 2018 11:59 am

Looks like TERF05 ventured across the river two days ago!

July 7 (even though the calendar says 8!)
TERF05 7-9-2018.jpg
July 9
TERF05  7-09-18.jpg
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Re: Live Tracking - Comments

Post by gemini » Mon Jul 16, 2018 6:05 pm

TERF05 doesn't seem to have gone very far since July 9 - except for a short adventure on the 14th. (click twice for a better view of the maps)s

TERF05's travels from July 10 - 13
7-10-18 to 7-13-18.jpg

TERF05's travels from July 14 - 17 (if it looks like we are predicting the future, it's because all transmissions are in UTC time - 9 hours ahead of BC)
7-14-18  to 7-17-18.jpg
They must have a very well stocked garbage dump in the NWT - she's showing no signs of wanting to leave!
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Re: Tracking TERF05

Post by gemini » Wed Jul 25, 2018 12:33 pm

Where we left TERF05.......(click maps 2x to enlarge)

July 17, 2018
7-17-2018.jpg

Where she's been......
July 18-25, 2018
7-18 - 7-25, 2018 1200 x 1545.jpg

Where she is today!
July 26,2018
7-26-2018.jpg
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Re: Tracking TERF05

Post by gemini » Sat Sep 01, 2018 1:18 am

August 31 - TERF05 appears to be very happy right where she is - If I am reading this map correctly, she hasn't moved from this area since she arrived on June 12. I wonder what is so attractive there?

Screenshot 1).jpg
Screenshot 2).jpg
Screenshot3).jpg
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Re: Tracking TERF05

Post by gemini » Sat Sep 15, 2018 10:11 am

Sept 15, 2018

No change. TERFO5 still hanging around in the same general area. When I spoke with David about TERF05 the other day, he felt it was highly likely that this is where TERF05 was born and bred and is in her home territory.
9-14-2018  TERF05.jpg
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Re: Tracking TERF05

Post by JudyB » Tue Jun 18, 2019 11:18 am

The signals from TERF05 disappeared during the winter and returned in the spring - and when I asked Myles and David about that, they told me that the transmitter is not actually moving and either fell off (which I'm hoping is the case) or something happened to TERF05. They have had people in the area looking for her or the tracker and they didn't find anything. I'm ever the optimist, so I'm thinking that the remains of an eagle would be easier to see than a tiny metal device. My personal current theory is that it might be in the river snagged on something - it wouldn't transmit during the winter when the river was frozen over, and the refraction from the water could contribute to the scattered locations being reported. Maybe. I'm hoping we'll find someone to look again this summer, or maybe in the fall, since another possibility is that it was caught on a branch and TERF05 pulled free.

TERF05 does have a blue band with G over 3 on her left leg - so maybe someday someone will send us a picture of her - fingers crossed.

Added - I forgot to mention that one of the reasons I thought we were seeing activity by TERF05 is that I didn't have a sense of the area, and didn't realize the territory where all the signals were being found was much smaller than one would expect from a nesting eagle.

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Re: Tracking TERF05 (tracked 2/14/2018 – 6/12/2018)

Post by JudyB » Thu Feb 09, 2023 4:32 pm

February 2023

As I reviewed TERF05's travels, knowing now that the transmitter was apparently still uploading data for a little over a year after it stopped moving enough to be outside the margin of error for the data uploads, I'd like to add a couple of additional pictures from the map.

Here's where TERF05 was at 1 pm on June 11th - it's about 600 meters (less than half a mile) from the area that appears to show a whole lot of activity:
20230212_003_TERF05a.jpg
(reminder - subtract 3 hours from the time of my screenshots to convert them to the pacific time I use for posting about our BC nests)


Here's the area where the tracker was uploading data that initially looked as if there were a lot of little flights from June 12 until October 10, 2018; the width of the river there is around 50 meters, or 160 feet; I'd be surprised if any of the lines that appear to be little excursions outside the core territory are more than 200 meters, and the vast majority of the time, the data was being uploaded from within a 100 meter circle.
20230212_003_TERF05b.jpg

Eagles fly a lot farther than that on a regular basis - and once we realized how small the area was, we knew the tracker wasn't really moving. Although it's now showing daily (mostly non-moving) data points when you look at the map's calendar for the period between October 11, 2018, and April 10, 2019, we weren't getting signals during the winter, possibly because the tracker was covered with snow, or possibly because it wasn't getting enough sun for other reasons. The tracker might also have come off in the water, and been covered by ice during that time.

There was one strange reading - for a couple of readings on April 21st and 22nd, it appears that the tracker was quite a ways away from the place all the other signals came from after June 12, 2018:
20230212_003_TERF05c.jpg

However, while that looks like a long flight - it's really only about 5 kilometers or 3 miles from the area where the tracker likely is - and is the sort of distance that normal nesting eagles fly regularly. I don't know the technology well enough to try to guess how the data got scrambled to make it look as if the tracker was there, but I suspect that's what happened.

The last data upload was at 5 pm on July 17, 2019.


She took such a different path than most of our tagged eagles during the 4 months when she was actually moving about and transmitting - it really makes me wish we could have followed her for another year or two to see what she would have done and where she would have/may have gone. :love:

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Re: Tracking TERF05 (tracked 2/14/2018 – 6/12/2018)

Post by JudyB » Sun Feb 12, 2023 12:24 pm

Summary of Travels (last updated February 12, 2023)
  • Received tracker February 14 2018 at the Vancouver Landfill in Delta, BC (almost 3 years old when banded)
  • After being released, she headed northeast to Stave Falls, arriving on February 18, then passed near Harrison Mills on the 18th as she headed for the area above Cheam View on the Fraser River, where she was on the 23rd and 24th; she followed the Fraser north, checking in above North Bend on the 25th, moving away from the river above Lytton on the 26th, then spending almost a week near Campbell Hills Ranch in Clinton, BC, before visiting nearby Loon Lake on March 7
  • She continued heading north, spending a day or two near Alexandria, then almost a week in a wooded area with some open space where there was obviously something of interest, before heading north again on the 23rd; she apparently felt it was time to travel - she went about 130km/80mi between check-ins on March 23 and 24, arriving a bit west of Prince George
  • She spent a couple of days there, then headed east to Kakwa Provincial Park and crossed into Alberta on the 28th, then went northeast, then northwest, ending up near Grande Prairie on March 30th.
  • TERF05 explored the area around Grande Prairie and Beaverlodge for a couple of weeks, from March 30 through April 13, then another long flight (320km/200mi) to Carcajou, arriving at the Peace River on April 14
  • Another long flight the next day (230km/140mi) brought her to some little lakes that don't appear to have names
  • She then went south for several days, arriving in Red Earth Creek on April 19th
  • Apparently that didn't suit her; when she checked in the next day, she was about 350km/220mi further north, almost to the border with the Northwest Territories
  • She rested a day, then crossed into NWT, reaching the area around Great Slave Lake on April 23rd
  • She moved up and down the Hay River for a few days, then headed west along the shore of the lake on the 29th, going a bit southwest to Tathlina Lake on the 30th, visiting the area south of the lake on May 1st, and returning to the area between Hay River and Vale Island on the 2nd
  • She headed South again on May 3rd, arriving in the northwest corner of Wood Buffalo National Park that evening, and spending a little over a week exploring what I think is Buffalo River near what may be Buffalo Lake (not named on all maps); Buffalo River appears to run between Great Slave Lake to the north and the lake which may be Buffalo Lake
  • Starting on the 13th, she headed northeast, then north, then southwest, arriving near the northern end of Buffalo River, about 15km south of Great Slave Lake; she stayed there until June 7
  • She arrived back along the Hay River on June 10, and we have a number of data points for her on the 11th from both sides of the river, moving back and forth within a kilometer of where her tracker finally stopped moving significantly on June 12, 2018
  • The tracker continued to upload data from a very small area along the river until October 10, then had minimal contact until April 10, 2019, after which it was again uploading data from the same tiny area until it finally stopped transmitting on July 17, 2019; most of the data points in the final year of transmission were logged as coming from an area about 100 meters or 300 feet in diameter - much smaller than you'd see even from an eagle staying close to a nest - so we believe that either the tracker fell off or something happened to TERF05. Personally, I (JudyB) think the tracker somehow came off - maybe somehow snagged on a tree branch or something in the water; it seems to me that an injured or dead eagle would have been easier for people to see when they went to try to find the tracker - and to be a bit blunt, I think if the eagle died, over the course of the next year, the body would have been moved enough that the tracker would have been buried and no longer transmitting. But unless an eagle with TERF05's blue band with silver G over 3 shows up somewhere, we'll never know for sure.
20230118_TERF05_map.jpg

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