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.

?

Afternoon / Evening
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:
5 feedings observed (07:16:58, 08:03:33 for 3 fledglings, 08:26:00 for 4 fledglings, 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