Little Egrets (コサギ)

Little egrets (コサギ) in December

In Shiga Prefecture, Japan, most egrets and herons fly south in mid-autumn. Only a few a few remain, including several little egrets in locations that I often visit. One stays in Hatonomori Park in Moriyama City (滋賀県 守山市 鳩の森公園), and several can be seen along Oyamakawa in Yasu City (滋賀県 野洲市 大山川). On December 21 and 22, 2017, I shot video clips of one feeding in each location.  (See Notes below.)

Both little egrets shake their legs and shuffle their feet to drive small fish and other aquatic animals from vegetation in shallow streams. This hunting method is used by other species of egrets, and it seems to work. These birds ate well.

Hatonomori Park in Moriyama City (滋賀県 守山市 鳩の森公園)

The little egret at Hatonomori Park usually perches on trees in a pond. The bird appears at the pond nearly every time I visit.

Little egret (コサギ)

Little egret (Egretta garzetta, コサギ) at Hatonomori Park in Moriyama (滋賀県 守山市 鳩の森公園)

Little egret (コサギ)

Little egret (Egretta garzetta, コサギ) at Hatonomori Park in Moriyama (滋賀県 守山市 鳩の森公園)

Little egret (コサギ)

Little egret (Egretta garzetta, コサギ) at Hatonomori Park in Moriyama (滋賀県 守山市 鳩の森公園)

Little egret (コサギ)

Little egret (Egretta garzetta, コサギ) at Hatonomori Park in Moriyama (滋賀県 守山市 鳩の森公園)

Little egret (Eコサギ)

Little egret (Egretta garzetta, コサギ) at Hatonomori Park in Moriyama (滋賀県 守山市 鳩の森公園)

Oyamakawa near Sakura Ryokuchi (滋賀県 野洲市 さくら緑地)

At Oyamakawa in Yasu City I have seen at least two little egrets.  The one in the video was in Omifuji. I often see another one upstream in Kitazakura near Sakura Ryokuchi Park. This bird is very shy.

Little egret (コサギ)

Little egret (コサギ) at Oyamakawa in Kitazakura, Yasu City

Little egret (コサギ)

Little egret (コサギ) at Oyamakawa in Kitazakura, Yasu City

Little egret (コサギ)

Little egret (コサギ) in Kitazakura, Yasu City

Little egret (コサギ)

Little egret (コサギ) in Kitazakura, Yasu City

Once I saw it fly some distance to an electrical tower. As it landed, two crows flew away but soon returned. After a few seconds the little egret took off, and a crow chased it back down to the riverbank.

Little egret (コサギ)

Little egret (コサギ) at an electrical tower in Kitazakura, Yasu City

We can see the intensity of bullying that crows can inflict on little egrets in a short clip that I shot. Sorry, it’s very rough and unedited, directly from the camera.

At the beginning if winter few egrets and herons remain in this part of Shiga Prefecture. I hope this winter will be good to our resident birds.


Notes

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