-
- HATAKEYAMA Yoshihiko
- 日本野鳥の会神奈川支部
Bibliographic Information
- Other Title
-
- 巣箱におけるシジュウカラの繁殖行動の観察
- スバコ ニ オケル シジュウカラ ノ ハンショク コウドウ ノ カンサツ
Search this article
Description
<p>The behavior of the Great Tits during their nesting period was observed by installing an infrared camera in their nestbox. Nest making began on March 16 and the chicks fledged on May 8 (54 days). </p><p>We observed a relationship between rainfall, humidity and the amount of sunlight. Incubation time was shorter on rainy days. On days of heavy rainfall, it is difficult to procure food so it is assumed that the incubation time was shorter due to the necessity of the female parent out getting food for herself. </p><p>It could be seen that during the breeding season the amount of food for the chicks decreased on rainy days and this affected their growth. Also, the number of feedings per day increased during the 1st to 5th days and decreased thereafter. This is due to the size of insects that the parent birds fed the chicks. At first they were fed small insects and then gradually fed larger insects as the chicks body size increased so the total amount of food increased as the number of feedings decreased. </p><p>Once the chicks obtained a certain amount of feathers the parent birds did not need too brood anymore during the day, however, they were also observed brooding on some nights. This was on rainy days when the chicks got wet when fed by the parent that has been soaked in the rain. To help the chicks maintain their body heat and not weaken the parent brooded to warm the chicks with their own body heat.</p>
Journal
-
- BINOS
-
BINOS 26 (0), 41-51, 2019-12-01
Wild Bird Society of Japan Kanagawa Branch