Numbers from last year were: 3,261 and 3,182 Black-necked Cranes, 804 and 1,158 Common Cranes Grus grus , 1,759 and 2,978 Bar-headed Geese Anser indicus , and 3,442 and 5,444 Ruddy Shelducks Tadorna ferruginea on 18 and 19 January 2002 respectively.

該次調查（同樣是1月18-19）兩天的數量分別為：黑頸鶴（3261，3黄色丝袜视频网，182）久久久久国产精品熟女，灰鶴（804国产精品手机在线，1158），斑頭雁（1759xx69欧美，2978）图片区自拍偷拍，赤麻鴨（3442，5444）操来操去网站。

From 27 January to 2 February 2003, we sailed from Myitkyina to Bhamo (A famous town of the 'Burma Road'). Apart from more than 1,000 cranes, we recorded many other waterbirds. Here are some interesting records: Spot-billed Pelicans (12 birds), Great Cormorants (almost 1,000 birds), Oriental Darters (65 birds), Black Storks (65 birds), Woolly necked Stork (1 bird), Lesser Adjutants (2 birds), Bar-headed Geese (3230 birds), Ruddy Shelducks (5423 birds), Gadwalls (2367 birds), Little Pratincoles almost 8000 birds

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Even in mid winter, the feeding Ruddy Shelducks in farmland were not equally distribute in farm fields.

淺水與草地是赤麻鴨種群在拉市海保護區(qū)越冬時所始終喜好的生境類型。

So prohibiting human disturbance and stopping shallow water areas and grassland habitat destruction as well as recovering the original habitat are important measures to mitigate the conflicts between Ruddy Shelducks and local people.

取食的時候亚洲国产午夜一区二区，雌性赤麻鴨的警戒水平隨捉到其雄性配偶的距離的增加而顯著增長免费看污的欧美操，而雄性赤麻鴨的警戒水平并未隨著到其雌性配偶的距離的改變而發(fā)生變化。

Shallow water area and grassland, with rich food and easily accessible water, were preferred by wintering Ruddy Shelducks.

泥灘地生境僅在越冬末期時被赤麻鴨喜好国产免费一区二区三区免费，這正好與草或者是水草在該類生境出現(xiàn)的時間一致亚洲玖玖色视频。

And 72. 4% in March in paired females and males Ruddy Shelducks respectively; contrary to this case, the time spent on resting and warning decreased from January to March in both sexes of the paired birds.

在一些具有進攻性的相遇中，配對赤麻鴨比沒有配對的單身個體表現(xiàn)得更為成功meiav色在线，這則意味著配對鳥具有更高的社會等級欧美日韩123级黄色片。

The sex ratio of the wintering population of Ruddy Shelducks at Lashihai Lake is severe male biased (male: female=1. 44: 1), the paired birds like to distributed in small group, and the degree of biased sex ratio were increased associated with the group size.

配對作為越冬期的一種策略，早期配對的赤麻鴨因具有較高的社會等級而得到了比非配對鳥更多的實惠看黄的视频网站，特別是當越冬的的食物資源十分有限的時候亚洲第一日韩在线，配對鳥占有這些有限資源的機會更多。

Ruddy shelducks are monogamous. They form and maintain the pair bond at wintering ground; individuals that form and maintain pair bond at this most stressful time might be thought to accrue some advantage that would be adaptive.

通過掃描取樣在拉市海越冬的配對赤麻鴨（2000年1月到3月）的活動時間預算国产精品麻豆A片大全，我們發(fā)現(xiàn)在此越冬的配對赤麻鴨主要有5種類型的行為活動色淫影视a，即，取食黄片视频大全免费在线观看、休息免费久久性爱视频、理羽、飲水国内免费久久久久久久久久10、和警戒黄色视频免费在线无码观看。

The observation period was divided into three sub-seasons according the phenology of waterbirds that wintering at the lake, namely: early winter , mid winter , and late winter . Ruddy Shelducks did not evenly distribute in the five habitat types during winter.

即使是在越冬中期，在農田中取食的赤麻鴨對整個農田生境的利用強度也并非一致亚洲日韩深夜福利高清；它們偏好于在潮濕的農田（灌溉不久或者是正在灌溉的農田）中取食或者是活動亚欧日本VA中文字幕久久，而盡量避免在干燥的農田（近期內沒有被灌溉的農田）中取食或活動。