Watching a wild duck family grow day by day reveals changes that are easy to miss in a short wildlife clip. This long-term observation follows a family of Eastern Spot-billed Ducks (Anas zonorhyncha) living in an urban river environment in Japan, documenting the ducklings from approximately 10 days old and then through much of their later development, from about 26 to 59 days after hatching.
Recorded between July 28 and September 14, 2025, this footage provides a continuous visual record of duckling growth, family behavior, foraging, resting, movement through the river habitat, and the gradual transition from small downy chicks toward juvenile ducks approaching independence.
Rather than presenting only dramatic moments, this record preserves ordinary behavior as well. For wildlife observation, these seemingly uneventful periods can be valuable: changes in body size, plumage development, locomotion, feeding behavior, social spacing, and interactions with the surrounding environment become much easier to recognize when the same family is followed repeatedly over several weeks.
Wildlife Featured in This Observation
Eastern Spot-billed Duck
Scientific name: Anas zonorhyncha
Japanese name: カルガモ (Karugamo)
The Eastern Spot-billed Duck is a dabbling duck native to East Asia and a familiar resident bird in much of Japan. Unlike strongly migratory duck species that are mainly seen in Japan during winter, Eastern Spot-billed Ducks can be observed throughout the year, including during the breeding season.
Females raise their ducklings without assistance from the male after hatching. The precocial ducklings leave the nest soon after hatching and are capable of walking, swimming, and feeding for themselves, while remaining dependent on their mother for guidance, protection, and access to suitable habitat.
Urban rivers, ponds, canals, and other human-modified waterways can therefore become important breeding and nursery habitats. Following an identifiable family over time provides an opportunity to document growth, survival, habitat use, and behavioral development under real urban wildlife conditions.
Observation Diary: July 28 – September 14, 2025
July 28, 2025 — First Encounter
00:00
This was my first encounter with the duck family I identified as the シF family. Based on their appearance and development, I estimated the ducklings to be approximately 10 days old.
At this stage, young Eastern Spot-billed Ducks still have the characteristic compact body and downy plumage of small ducklings. This early footage provides a useful reference point for comparison with their appearance several weeks later.
August 13, 2025
00:20
The main continuous period of this long-term record begins here. The family had already progressed considerably since my first encounter with them in late July.
Repeated observation of the same family makes it possible to see developmental changes that may not be obvious when observing unrelated ducklings on different days.
August 14, 2025
34:34
Another day in the family's daily life along the river. Long, minimally edited recordings preserve not only conspicuous behavior but also routine activities such as swimming, resting, feeding, preening, and moving between different parts of the habitat.
August 15, 2025
1:01:53
As the ducklings grew, their proportions and overall appearance continued to change. Daily or near-daily footage makes these gradual changes easier to compare.
August 16, 2025
1:10:16
The family remained together as the juveniles continued developing. Although older ducklings become increasingly capable of moving and feeding independently, the mother remains an important center of the family group during this stage.
August 17, 2025
1:30:24
Continued observation of the シF family. Their increasing body size makes the transformation from small down-covered ducklings toward juvenile Eastern Spot-billed Ducks progressively more apparent.
August 18, 2025
1:48:05
Another extended record of the family in its normal river habitat. Long observation sessions can reveal the rhythm of wildlife behavior that is often removed from edited videos: periods of activity alternate naturally with feeding, resting, preening, and simply remaining in one area.
August 20, 2025
2:36:18
The family continued to survive together. For a wild duck family, reaching these later developmental stages is significant because ducklings face numerous environmental hazards during their first weeks of life.
August 21, 2025
2:55:14
A shorter observation from the following day adds another chronological reference point to the family's development.
August 22, 2025
2:58:21
The record continues with another day of the ducklings' growth. When viewed sequentially, differences in size, plumage, and movement become increasingly noticeable.
August 23, 2025
3:13:51
By late August, the birds were beginning to look much less like the tiny ducklings recorded during the first encounter in July.
August 24, 2025
3:18:36
The family remained an identifiable social group. Observing the same individuals repeatedly is particularly useful for distinguishing actual developmental changes from differences that might otherwise result from comparing unrelated birds.
August 25, 2025
3:31:51
Another day of ordinary family life was recorded without attempting to reduce the observation to only its most visually dramatic moments.
August 26, 2025
3:49:53
As juvenile plumage develops, the appearance of young ducks gradually approaches that of adults. The transformation takes place incrementally, making chronological footage especially useful for visual comparison.
August 28, 2025
3:58:27
The late-August observation continues to document the family's survival and development in an urban freshwater ecosystem.
August 31, 2025
4:20:06
By the end of August, the difference from the tiny ducklings seen during the first encounter had become striking. Their changing proportions and plumage provide a visible record of post-hatching development.
September 1, 2025
4:25:32
The observations entered September with the family still being documented. These later records capture the transition toward the juvenile stage, when young ducks increasingly resemble full-sized birds.
September 2, 2025
4:28:19
Another chronological record of the family's development and behavior in the same urban river environment.
September 6, 2025
4:38:36
Several days later, the young ducks were continuing their progression toward independence. At this age, their appearance and behavior differ dramatically from those of newly hatched ducklings.
September 11, 2025
4:55:42
The observation period was approaching its conclusion. The family that had first appeared as a mother accompanied by small ducklings was now composed of well-developed juveniles.
September 14, 2025 — Final Observation in This Record
5:26:05
This is the final dated section of this long observation record. The ducklings had reached approximately 59 days of age.
The footage therefore preserves much of the シF family's development from small ducklings to nearly grown juvenile Eastern Spot-billed Ducks. Most importantly, all of the young in this family survived and grew to this advanced stage during the period I was able to follow them.
Taken together, these recordings provide a chronological visual reference for duckling growth, plumage development, family cohesion, and everyday behavior in an urban river habitat.
Why I Preserve Long, Unedited Wildlife Records
My YouTube Shorts mainly feature Eastern Spot-billed Duck families, along with unusual, beautiful, or important moments involving birds and other animals living in urban environments.
Short-form wildlife videos, however, inevitably show only a tiny fraction of what actually happened. They may contain music, sound effects, cuts, slow motion, captions, or other editing. I personally tend to be cautious about drawing conclusions from heavily edited wildlife footage because the context before and after a dramatic moment can be extremely important.
The short videos I publish are therefore based on a much larger body of field observation. Scenes used in edited videos are extracted from recordings like this one: long periods spent patiently following wild animals and documenting their behavior as it happened.
Whenever possible, I preserve the original, minimally edited or unedited footage as a record of the observation.
I have accumulated more than 1,000 days of date-based wildlife recordings. Individually, many of these videos may appear uneventful, repetitive, or inconveniently long. Collectively, however, I believe they have a different kind of value.
They preserve changes over time.
A single spectacular wildlife encounter can show an extraordinary moment. A chronological archive can show something else: growth, survival, seasonal change, recurring behavior, habitat use, individual differences, and the ordinary daily lives from which those extraordinary moments emerge.
For several years, I followed Eastern Spot-billed Duck families particularly intensively, recording their movements and development in urban waterways. This video represents the final portion of that style of continuous observation for the 2025 breeding season and also marks a personal turning point after approximately five years of intensive duck-family documentation.
These recordings were originally made primarily as my own field notes and evidence of what I observed, so I recognize that they are not always convenient viewing. Nevertheless, I hope this archive may also be useful to birdwatchers, wildlife enthusiasts, researchers, students, or anyone interested in animal behavior and urban ecology.
If you are interested in observing wildlife without background music or dramatic editing, the complete archive is available here:
🦆Raw Bird & Wildlife Footage | No BGM🌍️
https://www.youtube.com/playlist?list=PLL7dTQKKqrPzZpmfSA98tn9tXWfkp1jBB
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