Karula National Park 2/ Must toonekurg 4

[marika.solo]

[marika.solo]

[marika.solo]

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August 09
Hello everyone

CHICK
- 1st chick: 78 days old (hatched in the night 21./22.05)
- 2nd chick: 78 days old (hatched in the night 21./22.05)
- 3rd chick: 77 days old (hatched on 23. 05)
- 4th: on 24. 05; brood reduction by female on 28.05 - 4 days old

- one chick, Bonus 2, adopted on 18.06

MAIDEN FLIGHT
- on 26.07 at - 7203
- on 27.07 at - 7201
- on 29.07 at - 7202
- on 01.08 at - 710L / Bonus

Maiden Flights & Chick Age:
26 July: 1st chick (7203) – 65–66 days old
27 July: 2nd chick (7201)– 66–67 days old
29 July: 3rd chick (7202) - 67 days old

Note on fledging age: The chicks became fully flight-capable slightly earlier than the standard Baltic reference range (68–72 days). This earlier maiden flight (at 65–66 days) was primarily facilitated in my opinion by an abundant and consistent food supply throughout their development, promoting optimal feather growth and physical condition.

Leg Ring Identification:
Three of the chicks carry rings 7201, 7202, and 7203, while the adopted/foster chick (referred to as "Bonus") carries the distinct ring 710L.

1/ By tracking 35 chicks with transmitters, Polish researchers found that these young birds permanently left their nests at an average of 87 days of age, with a maximum of 108 days. Before their definitive departure for migration, the fledglings initially fly within an average distance of up to 200 meters, and as they get older, this distance increases to an average of up to 500 meters.(Dr. Anderwald)

2/ Survival rates are higher for chicks that spend more time at the nest after fledging, as they return to the nest and gradually gain independence while still receiving food from their parents. For another 2 to 4 weeks after becoming able to fly, they will return to the nest to rest or spend the night. (Dr. Strazds)

3/ Fledglings learn to search for foraging sites and acquire food on their own only after their definitive departure from the nest (migration). (prof. Zielinski)

[marika.solo]

youtube chat info - thx to everyone
YouTube comments do not reflect all nest events throughout the day, including chick feedings; therefore, the log is unfortunately incomplete.

Nest Activity Log 09/08/2026 (in the evening - whole day)
Log compiled from chat observations and structured with the assistance of Gemini AI.

Events Timeline
data mostly by user Natalia / @Наталья-б9с7й

Morning / Forenoon
05:25:17 Fledglings 7203, 7201, 7202 stand on the edge of the nest; Bonus (710L) is in the centre.

05:27:38 7201 departs the nest.
05:28:15 7203 jumps onto a branch and departs at 05:28:45.
05:29:44 Bonus (710L) departs the nest.
05:29:48 7202 departs into the forest; nest is empty.

06:25:39 7202 lands in the nest.
06:26:42 A stork lands on a tree branch on the left.
06:33:00 7202 begins vocalising.
06:33:45 7203 lands in the nest from the forest, followed by Bonus (710L) from the tree; both vocalise.

07:14:23 7201 lands in the nest; all fledglings vocalise.
07:16:58 Parent arrives and delivers fish; departs at 07:17:15.
07:32:07 7203 departs into the forest.
07:40:04 Bonus (710L) departs into the forest.
07:42:53 7202 departs the nest.

07:50:57 7203 returns to the nest where 7201 is present.
08:00:00 Both fledglings vocalise.
08:02:56 7202 lands in the nest.
08:03:33 Parent delivers fish for the 3 fledglings present; Bonus (710L) is absent.

08:23:51 Bonus (710L) lands in the nest.
08:26:00 Parent delivers fish for all 4 fledglings; feeding lasts until 08:26:59.
08:41:17 7203 jumps onto a branch while 7202 rests in the nest.
10:25:20 7201 interacts with a butterfly near the nest.

? edit: completed (to 17:30)

Afternoon / Evening
12:17:00 7203 remains perched on the branch while the other 3 fledglings are in the nest.
12:36:00 3 fledglings are resting in the nest bowl.
12:36:29 7203 jumps from the branch into the nest.

14:39:28 Parent arrives and delivers food (likely fish).

15:12:00 All 4 fledglings are present in the nest; camera stream drops out briefly.
15:31:25 Camera stream is restored.
15:39:32 Parent arrives and delivers food; fledglings pick up small food items from the nest bowl afterwards.

17:30:17 Parent arrives, delivers fish, and departs at 17:30:34; fledglings pick up small remaining items in the nest afterwards.

17:38:22 Bonus (710L) manipulates a hanging branch on the left.
17:44:04 Parent arrives, delivers fish again, and departs at 17:44:22.
18:23:00 - 18:26:00 7202 and 7201 engage in physical interaction/play.

20:30:00 7201, 7202, and Bonus (710L) stand at the nest edge while 7203 stays in the centre.
20:52:40 Bonus (710L) jumps to the right branch after interaction with 7202.
20:55:54 7203 jumps onto a branch and departs at 20:56:39.
20:57:39 Bonus (710L) departs from the right branch.
20:57:56 7201 departs the nest.
20:58:01 7202 departs the nest.

20:58:26 A stork flies past the nest from the left.
21:00:23 Bonus (710L) returns and lands in the nest.
21:16:00 - 21:20:00 Bonus (710L), alone in the nest, moves actively around the nest bowl.
21:36:16 7201 returns and lands in the nest.
21:51:23 Only 7201 and Bonus (710L) are present in the nest (camera stream offline briefly).
22:00:00 Camera stream restored; 7201 and Bonus (710L) remain in the nest (7203 and 7202 absent for the night).
22:04:52 Both present fledglings become alert.

Summary Highlights
Feedings recorded:
7 feedings observed during the day (07:16:58, 08:03:33, 08:26:00, 14:39:28, 15:39:32, 17:30:17, and 17:44:04).
Night presence:
Only 2 fledglings (7201 and Bonus 710L) stayed in the nest overnight.

[marika.solo]

[marika.solo]

Bonus



Bonus out

[marika.solo]

7203 and 7202 are somewhere around hopefully

[marika.solo]

previous post (09.08) viewtopic.php?p=63447#p63447
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August 10
Hello everyone

CHICK
- 1st chick: 79 days old (hatched in the night 21./22.05)
- 2nd chick: 79 days old (hatched in the night 21./22.05)
- 3rd chick: 78 days old (hatched on 23. 05)
- 4th: on 24. 05; brood reduction by female on 28.05 - 4 days old

- one chick, Bonus 2, adopted on 18.06

MAIDEN FLIGHT
- on 26.07 at - 7203
- on 27.07 at - 7201
- on 29.07 at - 7202
- on 01.08 at - 710L / Bonus

Maiden Flights & Chick Age:
26 July: 1st chick (7203) – 65–66 days old
27 July: 2nd chick (7201)– 66–67 days old
29 July: 3rd chick (7202) - 67 days old

Note on fledging age: The chicks became fully flight-capable slightly earlier than the standard Baltic reference range (68–72 days). This earlier maiden flight (at 65–66 days) was primarily facilitated in my opinion by an abundant and consistent food supply throughout their development, promoting optimal feather growth and physical condition.

Leg Ring Identification:
Three of the chicks carry rings 7201, 7202, and 7203, while the adopted/foster chick (referred to as "Bonus") carries the distinct ring 710L.

1/ By tracking 35 chicks with transmitters, Polish researchers found that these young birds permanently left their nests at an average of 87 days of age, with a maximum of 108 days. Before their definitive departure for migration, the fledglings initially fly within an average distance of up to 200 meters, and as they get older, this distance increases to an average of up to 500 meters.(Dr. Anderwald)

2/ Survival rates are higher for chicks that spend more time at the nest after fledging, as they return to the nest and gradually gain independence while still receiving food from their parents. For another 2 to 4 weeks after becoming able to fly, they will return to the nest to rest or spend the night. (Dr. Strazds)

3/ Fledglings learn to search for foraging sites and acquire food on their own only after their definitive departure from the nest (migration). (prof. Zieliński)

[marika.solo]

youtube chat info - thx to everyone
YouTube comments do not reflect all nest events throughout the day, including chick feedings; therefore, the log is unfortunately incomplete.

Nest Activity Log 10/08/2026 (in the evening - whole day)
Log compiled from chat observations and structured with the assistance of Gemini AI.

Events Timeline
data mostly by user Natalia / @Наталья-б9с7й

NIGHT / EARLY MORNING

• 21:36:00 (Previous Evening) – Fledgling 7203 returned to the nest; 7203 and 710L spent the night in the nest.

• 05:18:45 – Fledgling 710L departs the nest into the forest.
• 05:18:52 – Fledgling 7203 jumps onto a branch.
• 05:19:04 – Fledgling 7203 departs into the forest, leaving the nest empty.

MORNING / FORENOON

• 05:56:14 – An adult parent arrives and nest maintenance followed.
• 05:57:27 – Fledgling 710L returns to the nest; the adult parent departs to the left.
• 05:57:57 – The adult parent returns, perching on a branch before entering the nest at 05:58:08.
• 05:58:08 – FEEDING 1: The adult parent regurgitates a large quantity of fish. 710L consumes all the fish alone.
• 05:58:28 – The adult parent departs towards the camera, taking one fish back.

• 06:01:28 – Fledgling 7201 arrives; 710L sits, vocalises, and grasps 7201 by the bill.
• 06:49:03 – Fledgling 7202 arrives in the nest.
• 06:50:55 – Fledgling 7203 arrives from the left.
• 06:52:00 – Fledglings erect their feathers/alert posture towards an external stimulus.

• 07:15:07 – Fledgling 7202 departs into the forest.
• 07:25:18 – Fledgling 7201 takes a short flight and returns at 07:26:06.
• 07:27:38 – Fledgling 7202 returns from the direction of the camera.

• 08:18:27 – Fledgling 710L departs towards the camera.
• 08:27:54 – Fledgling 7201 departs to the left.
• 08:30:03 – Fledgling 7201 arrives from the left.
• 08:30:06 – Fledgling 710L arrives from the camera side.
• 08:30:44 – FEEDING 2: An adult parent arrives from the left and delivers a small food offering to the fledglings.
• 08:30:55 – The adult parent departs.

• 08:34:12 – Fledgling 710L departs towards the camera.
• 08:35:08 – Fledgling 7203 jumps onto a branch.
• 08:40:00 – Fledglings 7203 (from branch), 7202, and 7201 depart into the forest.

• 09:40:58 – Fledgling 710L returns to the nest.
• 09:41:28 – Fledgling 7201 returns to the nest.
• 09:42:05 – Fledgling 7203 arrives from the left.
• 09:42:11 – Fledgling 7202 arrives and perches on a branch.

• 09:51:25 – Fledgling 7201 departs the nest.
• 09:58:32 – Fledgling 710L departs the nest.
• 10:07:19 – Fledgling 7202 departs from the branch. Fledgling 7203 remains in the nest.
• 10:39:25 – Fledgling 7201 arrives.
• 10:39:32 – Fledgling 7202 arrives.

• 10:55:00 – Three fledglings (7201, 7202, 7203) are present in the nest.
• 10:59:59 – Fledgling 710L returns to the nest.
• 11:00:16 – FEEDING 3: An adult parent arrives in the nest and delivers food.
• 11:00:30 – The adult parent departs.

• 12:15:47 – An adult parent arrives on a branch following fledgling vocalisations (12:13–12:15).
• 12:15:59 – FEEDING 4: The adult parent enters the nest and regurgitates fish for the fledglings.
• 12:16:12 – The adult parent departs.

AFTERNOON / EVENING

• 13:02:00 – All four fledglings are resting in the nest.
• 13:25:55 – A large pine tree collapses near the right side of the nest structure. Startled by the event, fledglings 710L, 7201, and 7203 flush to the left from the nest, while fledgling 7202 remains in the nest.
• 13:59:56 – Fledgling 7201 is standing alone in the nest.

• 14:24:10 – Fledgling 7201 arrives from the forest.
• 14:25:26 – Fledgling 7203 arrives from the left, makes contact with an overhead branch during landing, causing a branch fragment to fall, and flushes again immediately.

• 14:25:45 – Fledgling 7202 departs towards the camera.
• 14:26:42 – Fledgling 710L arrives from the camera side and joins 7201 in the nest.
• 15:10:25 – Fledgling 7202 arrives in the nest.
• 16:25:42 – FEEDING 5: An adult parent arrives and delivers a small portion of food to 710L, 7201, and 7202 (7203 is not present).
• 16:25:50 – The adult parent departs.

• 16:40:42 – Fledgling 7203 arrives on a branch, jumping down into the nest at 16:41:13.
• 16:46:25 – The adult female parent passes the nest on the right and perches on a tree to the left.
• 16:46:44 – FEEDING 6: The adult female parent enters the nest and delivers fish.
• 16:46:54 – The adult female parent departs.

• 20:12:26 – Fledgling 7203 jumps onto a branch.
• 20:14:12 – Fledgling 710L steps onto the right branch, returning to the nest at 20:18:27.
• 20:34:00 – Strong wind. Fledglings 7202, 7201, and 710L stand facing away from the camera while 7203 remains perched on the branch.
• 21:26:00 - 21:27:55 – Stream transmission interruption; all fledglings remain present upon stream restoration.

--------------------------------------------------

SUMMARY HIGHLIGHTS
• Total of 6 feedings recorded throughout the day (05:58:08, 08:30:44, 11:00:16, 12:15:59, 16:25:42, and 16:46:44).
• At 13:25:55, a large pine tree collapsed nearby on the right side, startling three fledglings into flight while 7202 remained in the nest.
• Brief stream camera outage occurred between 21:26:00 and 21:27:55.

I asked Svetlana about our female. @СветланаКлюева-н6у answered regarding the female's identification and deliveries:
Observations from Yesterday (9 August 2026):Svetlana believes the female visited the nest 3 times in total: 15:39 – Female present at the nest. 17:30 – Fish delivery (probably from the feeding basket). 17:44 – Another fish delivery.
Observations from Today (10 August 2026):16:46 Feeding: Svetlana confirmed me that the parent delivering food at 16:46 was indeed the female. She mentioned that she had not closely examined the other feedings of the day due to a lack of time.
Thank you Svetlana!

[marika.solo]

​​everyone returned to the nest: 09:40:58 + 09:41:28 + 09:42:05 + 09:42:11 (on the branch)
out again: 09:51:25 - 09:58:32 - 10:07:19 (from the branch)
7203 still on the nest (10:12 and next)