Karula National Park 2/ Must toonekurg 4

[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 12/08/2026 (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

05:22:26 Bonus (710L) moved to the branch on the right. 7202 and 7201 stayed in the nest, 7203 perched on the branch above.
05:29:25 Bonus (710L) returned to the nest.
05:30:07 Bonus (710L) flew into the forest, followed by 7203 at 05:30:12, and 7201 and 7202 between 05:30:17 and 05:30:26.

05:41:37 7201 returned to the nest.
05:43:39 Bonus (710L) arrived at the nest.
05:56:07 7201 flew into the forest; Bonus (710L) remained in the nest.

06:14:00 Bonus (710L) vocalised in the nest as another stork flew past and landed on a neighbouring tree to the left at 06:14:09.
06:35:24 The stork left the tree and flew in the distance.
06:36:17 7202 arrived at the nest.
06:37:37 - 06:37:52 FEEDING: The parent arrived and delivered fish from the feeding basket for 710L and 7202.
06:39:38 7203 arrived at the nest.
06:57:33 7201 arrived at the nest. All four fledglings were present.

07:20:55 Bonus (710L) moved to the right branch.
07:40:35 Bonus (710L) returned to the nest.
07:41:52 - 07:42:09 FEEDING: The parent delivered a large quantity of fish.

09:15:36 7203 flew into the forest.
09:16:44 7201 flew into the forest.
09:16:50 Bonus (710L) flew off, followed by 7202 at 09:17:09. The nest was left empty.
09:31:45 7202 returned to the nest.
10:27:51 7202 flew away again, leaving the nest empty.

11:14:42 7202 returned to the nest. 7201 arrived from the forest at 11:14:59, 7203 at 11:15:08, and Bonus (710L) at 11:15:58.
11:32:58 - 11:33:07 FEEDING: The parent delivered food.

Afternoon / Evening

14:10:00 Rain started at the nest site.
14:17:28 - 14:17:36 FEEDING: The parent arrived, delivered food, and departed immediately.
14:21:57 Bonus (710L) moved to the right branch, returning to the nest at 14:35:52.
15:39:00 Strong winds at the nest site.

16:47:00 7202 and 7203 played with sticks in the nest.
17:54:00 7202 and 7201 played with sticks in the nest.

18:58:45 Bonus (710L) jumped to a branch.
19:01:03 7203 jumped onto the branch alongside 710L.
19:06:11 Bonus (710L) flew away from the branch.
19:19:39 7201 flew away and landed on a tree in the distance at 19:19:44.

19:33:55 Bonus (710L) returned to the nest, then flew to a tree at 19:37:54.
19:55:52 7202 took off for a short flight and returned at 20:01:05.
20:00:50 7203 flew from the branch to join 7201 on the distant tree.
20:06:33 7202 flew to the nearby tree. By 20:08, three fledglings were perching together on the tree.

20:09:39 Bonus (710L) flew back to the nest from the tree, then flew away again at 20:20:58.
20:22:40 A fledgling arrived on a branch, identified as Bonus (710L), who jumped into the nest at 20:35:01.
20:36:24 7203 returned to the nest area.
20:37:00 Bonus (710L) moved onto the right branch.
20:44:02 7203 jumped onto the branch above the nest.

20:58:00 Bonus (710L) is resting in the nest, while 7203 is visible perching on its favourite branch above the nest for the night. The remaining two fledglings are out of camera view.

Summary Highlights:

• Four feedings were recorded during the day: at 06:37:37, 07:41:52, 11:32:58, and 14:17:28.
• The parent brought fish from the feeding basket in the morning feedings, while food brought during later feedings originated from natural sources.
• All four fledglings (7201, 7202, 7203, and Bonus 710L) were active, multiple local flights, perching on neighbouring trees, and playing with sticks in the nest.

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August 13
Hello everyone

CHICK
- 1st chick: 82 days old (hatched in the night 21./22.05)
- 2nd chick: 82 days old (hatched in the night 21./22.05)
- 3rd chick: 8 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 13/08/2026 (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 710L flies off to the right; 7203 remains on the branch.
05:34 7203 departs from the branch into the forest.

05:50 - 05:52 7202 arrives in the nest; an adult bird lands on a branch. 7203 jumps into the nest, followed by 710L.
05:52 Feeding by a parent (fish) for 3 fledglings (7201 is absent).

06:27 Feeding by the male (fish) for 3 fledglings (7201 is absent).
06:39 7201 arrives at the nest. 710L aggressively attacks and chases 7201, pushing 7201 out of the nest.
06:55 7203 departs into the forest.

07:01 - 07:06 7203 returns. 7201 briefly lands in the nest, moves to a branch, and jumps back in. 710L again aggressively pecks 7201, forcing 7201 to fly off into the forest.
07:07 Feeding by a parent (fish) for 3 fledglings (7201 is absent).

07:29 - 07:50 7203 moves to a branch, then to a nearby tree, and finally departs into the forest.
07:58 7201 returns to the nest.
08:38 Feeding by a parent (fish) for all 4 fledglings.
09:19 7203 returns to the nest.


Afternoon / Evening
13:47 Feeding by a parent (natural prey/frogs).
14:20 - 14:54 710L moves to the right branch and returns to the nest at 14:54.

15:09 Feeding by a parent. Intense competition among the fledglings for the fish.
16:43 Quick feeding by a parent (mostly frogs).

17:16 - 17:33 Departures from the nest: 7203, 7201, and 7202 fly off into the forest. 710L moves to the branch, jumps into the nest, and departs into the forest at 17:33. The nest remains empty.
17:48 - 17:49 All 4 fledglings return to the nest in quick succession.
17:50 Feeding by a parent (small portion).

19:30 Feeding by a parent (fish).
19:58 Feeding by a parent (large portion of fish).

20:10 - 20:37 7202 flies into the forest and returns to a branch at 20:24. 710L moves out to a branch.
20:43 Night posture: 7203 and 7201 are in the nest; 710L and 7202 are perched on branches.


Summary Highlights

• Feedings:
  10 feedings recorded throughout the day (05:52, 06:27, 07:07, 08:38, 13:47, 15:09, 16:43, 17:50, 19:30, 19:58).
• Behavioral Notes:
  Intra-brood aggression was observed during the morning hours, where foster chick Bonus (710L) repeatedly attacked and excluded 7201 from the nest during feeding attempts. 7201 successfully rejoined the group and fed during later deliveries.

[marika.solo]

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[marika.solo]

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August 14
Hello everyone

CHICK
- 1st chick: 83 days old (hatched in the night 21./22.05)
- 2nd chick: 83 days old (hatched in the night 21./22.05)
- 3rd chick: 82 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 14/08/2026 (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