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简讯 | 南京市老山地区黑鸢繁殖期行为观察

  • 2026-03-22 04:37:14
简讯 | 南京市老山地区黑鸢繁殖期行为观察

南京市老山地区黑鸢繁殖期行为观察

Observations on the breeding behaviour of Black Kites in the Laoshan Area, Nanjing

Abstract: Based on continuous field observations at an urban breeding site in Nanjing, we documented the breeding behavioural sequence and nestling development of Black Kites Milvus migrans. The results revealed stage-specific parental roles, nestling-period feeding characteristics, and fledging patterns within an urban ecosystem. These findings indicate a high degree of behavioural plasticity in response to urban environments, while also highlighting potential exposure to anthropogenic disturbance and pollution. Together, this study provides valuable baseline information for advancing our understanding of the breeding ecology of urban-dwelling raptors.

黑鸢(Milvus migrans)是一种广泛分布于欧亚大陆、非洲及澳大利亚部分地区的中大型猛禽。既有研究表明,该物种不仅在自然林地、湿地及农田景观中繁殖,也能够在高度城市化环境中利用城市绿地、行道树及人工结构成功筑巢(Rashid et al. 2025)。相关繁殖生态研究主要集中于欧洲及南亚地区,内容涵盖巢址选择、繁殖成功率及对人为干扰的响应等方面(Kumar et al. 2014)。然而,我国关于黑鸢的研究多以分布记录、迁徙路线及救护个案报道为主,其在城市生态系统中的繁殖行为与育雏过程仍缺乏系统、连续的野外观察资料。

1  研究地点与方法

老山地区位于南京市浦口区,以低山丘陵地貌为主,森林覆盖率高,自然生态本底较好。近年来,随着城市化进程的推进,老山周边土地利用方式和景观格局发生变化,人类活动对区域生态环境的影响逐渐增强。本研究以老山地区一处稳定繁殖的黑鸢巢区为对象,自2025年3月至8月开展多日野外观察。以直接观察为主,辅以数码相机进行影像记录。观察内容包括繁殖期内的交配行为、孵卵行为、亲鸟育雏行为以及雏鸟发育情况等。所观察的黑鸢巢筑于南京市老山地区的一棵松树上,巢距地面约4.2 m,巢址处于相对开阔的林缘环境,周边植被以乔木-灌木-草本的复层结构为主,林下通透性较高。巢址及其周边分布有多处人工水体,为黑鸢提供潜在的鱼类食物资源。

2  结果 

本研究观测时间为期71 d, 有效观测时长约为468 h(表1)。根据观察,此对黑鸢的繁殖周期约持续5个月:3月中旬交配,4月初产卵并孵卵2枚,雏鸟在5月8日前后出壳,2只雏鸟背部和腰部羽色深浅差异明显,据此区分为1号(浅色)和2号(深色)雏鸟(图1)。5月8日至6月底为育雏期,1号雏鸟于6月26日出飞,2号雏鸟于6月30日首次出飞,并在巢区周边活动至8月下旬。在有效观察期间,此对黑鸢表现出明显的亲代协调分工与阶段性行为变化。

表1  黑鸢繁殖期各阶段观察情况

Table 1  Observation details of the Black Kite Milvus migrans during different breeding stages

图 1  黑鸢育雏期雏鸟背部羽毛的变化(陈冬銮 摄)

Fig. 1  Changes in dorsal plumage of Black Kite nestlings during the nestling period (Photo by Dongluan Chen)

a. 6月8日;b. 6月12日;c. 6月20日。(图中标注为1号和2号雏鸟)

a. June 8; b. June 12; c. June 20. (Chick 1 and Chick 2 are indicated in the figure)

在整个繁殖期内共记录到139次有效喂食,05:00 ~ 08:00、08:00 ~ 11:00、11:00 ~ 14:00、14:00 ~ 17:00和17:00 ~ 20:00时段分别记录到28、32、37、29和13次,其中中午时段喂食活动相对集中,可能与热上升气流及猎物可得性增加有关。由于未能对全部时间完整观测,上述结果仅反映观察时段内情况。食物种类以鱼类和鸟类为主,分别占41.7%和30.2%,未知食物占比28.1%。此外,我们观察到亲鸟携带哺乳动物内脏及人造物回巢,偶尔出现误食塑料制品的现象(图2)。

图 2  黑鸢育雏期亲鸟与雏鸟的摄食行为类型(陈冬銮 摄)

Fig. 2  Feeding behaviour of parent Black Kites and nestlings during the nestling period (Photo by Dongluan Chen)

a. 亲鸟携带养殖鸽子喂食雏鸟;b. 亲鸟携带野生林鸟雏体;c. 亲鸟携带淡水鱼类(鳊鱼Parabramis pekinensis);d. 亲鸟携带哺乳动物内脏;e. 雏鸟误食塑料玩具(未能识别个体);f. 亲鸟误吞塑料吸管。

a. Parents feeding nestlings with a domestic pigeon; b. Parent carrying a wild passerine chick; c. Parents carrying a freshwater fish (bream Parabramis pekinensis); d. Parents carrying mammalian viscera; e. Nestlings ingesting a plastic toy (Unable to identify individuals); f. Parent ingesting a plastic straw.

3  讨论

在产卵和孵卵阶段,为降低人为干扰导致弃巢的风险,我们采用低强度观察方式,因此未能记录到准确的产卵日期,相关繁殖阶段以时间范围而非具体日期进行描述。观察期间,完全由雌鸟承担孵卵。5月8日前后雏鸟出壳,进入育雏期,随着亲鸟对观察者逐渐适应,观察强度有所提高。5月8 ~ 14日,雌鸟以巢内保温与看护为主,约95%的时间停留于巢内。此后雌鸟在巢内的停留时间逐步减少:5月14日后,其在巢内的停留时间约占80%,并出现短暂离巢行为,常停立于巢区周围树木上执行警戒;5月22 ~ 31日,雌鸟在巢内的停留时间进一步下降至约40%,白天多在巢区周边活动,间歇性返回巢内,日落后短时间内仍记录到雌鸟回巢行为。

自6月1日起,雌鸟不再持续停留于巢内,仅在喂食时短暂回巢。在日落后短时间内未再记录到雌鸟回巢,这表明其育雏行为由保温与看护转变为以食物供给和巢区防卫为主。8月1 ~ 20日雏鸟基本完成离巢,亲鸟繁殖相关行为明显减少,因此调查强度有所降低。在整个观察期间,雄鸟一直主要承担觅食及巢区巡视任务。

育雏期内雏鸟体型与羽毛发育呈现明显的阶段性变化(图3),并且2只雏鸟在离巢时间与行为模式上存在明显差异。1号雏鸟出飞后仅在巢区附近100 m偶尔出现,未再返回原巢,7月10日后未再被观察到;2号雏鸟出飞后仍返回原巢,并在随后一段时间内大部分时间停留于巢内。原巢于7月14日因风雨坍塌后,2号雏鸟仍在原巢址附近活动并持续获得成鸟喂食,体现了亲代照护的延续性。7月20日后2号雏鸟在原巢址停留时间明显减少,但仍在巢区附近活动,直至8月下旬才未再于巢区范围内被观察到。

黑鸢雏鸟体型与羽毛发育变化记录(未能识别个体)

Fig. 3Developmental changes in body size and plumage of Black Kite nestlings (Unable to identify individuals)

a. 5月14日;b. 5月22日;c. 5月30日;d. 6月8日;e. 6月16日;f. 6月22日。a ~ c由汪新月拍摄,其余由陈冬銮拍摄。 

a. May 14; b. May 22; c. May 30; d. June 8; e. June 16; f. June 22. a ~ c was photographed by Xinyue Wang, and the rest was photographed by Dongluan Chen.

本研究记录了一对黑鸢在城市生态系统中繁殖期内的亲鸟行为特征及其雏鸟发育与离巢过程。结果显示,该巢黑鸢能够在城市环境中完成完整的繁殖周期,同时也面临人类活动带来的污染与干扰风险,与Kumar 等(2014)报道的总体情况一致但略有不同:在该研究中,黑鸢在城市化和半城市化区域的繁殖期食物主要依赖屠宰场废弃肉块、鼠类及城市常见鸟类等;而本研究中老山地区黑鸢在育雏期的食物组成以鱼类和林鸟雏鸟为主,人类废弃食物占比不高。该差异可能与研究区域环境条件有关:南京市老山地区水库和鱼塘分布较多,且森林覆盖率较高,可能影响育雏期可利用猎物的组成,从而对取食行为产生影响。鉴于本研究基于单一巢区的描述性观察,相关行为特征仅反映个案层面的表现,未来有必要通过多巢位、长期监测及定量数据分析,进一步评估城市环境因素对黑鸢繁殖行为的影响。

参考文献

Kumar N, Mohan D, Jhala Y V, et al. 2014. Density, laying date, breeding success and diet of black kites Milvus migrans govinda in the city of Delhi (India). Bird Study, 61(1): 1–8.

Rashid G M, Butt A, Qadir A, et al. 2025. Exploring black kite (Milvus migrans) dynamics: Seasonal abundance and habitat preferences in an urban gradient. Journal of Asia-Pacific Biodiversity, 18(1): 101–107. 

作者信息

陈冬銮,汪新月,鞠澄辉*

*通讯地址:juchenghui@njfu.edu.cn

南京林业大学  南京  210037

第一作者介绍:陈冬銮,女,硕士研究生;研究方向:鸟类繁殖生态学;E-mail: chendongluan@njfu.edu.cn。

王帮凤

南京梁田生态科技有限公司  南京  210036

陈月龙

南京市红山森林动物园  南京  210028

致谢

朱磊老师在本研究中给予了宝贵指导与帮助,特此鸣谢!

引用格式

陈冬銮, 王帮凤,  汪新月, 等. 2025. 南京市老山地区黑鸢繁殖期行为观察. 中国鸟类研究简讯, 预发表.

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  1. CONNECT:[ UseTime:0.000970s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001400s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002373s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000723s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001324s ]
  6. SELECT * FROM `set` [ RunTime:0.000625s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001417s ]
  8. SELECT * FROM `article` WHERE `id` = 484237 LIMIT 1 [ RunTime:0.005167s ]
  9. UPDATE `article` SET `lasttime` = 1775402524 WHERE `id` = 484237 [ RunTime:0.006798s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000668s ]
  11. SELECT * FROM `article` WHERE `id` < 484237 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002646s ]
  12. SELECT * FROM `article` WHERE `id` > 484237 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003685s ]
  13. SELECT * FROM `article` WHERE `id` < 484237 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002226s ]
  14. SELECT * FROM `article` WHERE `id` < 484237 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001801s ]
  15. SELECT * FROM `article` WHERE `id` < 484237 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003776s ]
0.199288s