Common Tern (Sterna hirundo) Science Article 8 abstract Disturbance can reduce productivity by disrupting nesting behavior. We examined responses of nesting Common Terns (Sterna hirundo) and Laughing Gulls (Larus atricilla) to frequent overhead flights by Herring (L. argentutus) and Great Black-backed (L. murinus) gulls to determine if such flyovers may have contributed to declines in […]
Category: Eurasia
Brood size and food provisioning in Common Tern s Sterna hirundo an d Arctic Terns S . paradis a: consequences for chick growth
Common Tern (Sterna hirundo) Science Article 1 abstract Food provisioning rates and chick growth rates of Common Te rns Sterna hirundo and Arctic Tems S. paradis a were studied in Northeast Engl and. Adult tems of both species fed large broods more frequently th an those containing fewer chicks . Energy supply per nestling declined […]
Age differences in Cattle Egrets Bubulcus ibis foraging with wild ungulates in Kenya
Cattle Egret (Bubulcus ibis) Science Article 10 abstract The foraging behavior of adult and juvenile Cattle Egrets was studied at Nairobi Park, Kenya. Egrets fed on insects scared up by foraging Buffalo, Zebra, Wildebeest and Hartebeest. Adults attempted to capture more items, capture more items, and had higher capture success rates than juveniles, although the […]
Promiscuity in the cattle egret (bubulcus ibis)
Cattle Egret (Bubulcus ibis) Science Article 3 abstract Among 19 pairs of individually marked Cattle Egrets( Bubulcus ibis)c a. 3 in 10 successful copulations were extrapair. Extrapair copulations potentially increased the reproductive successof five of the males by 18.6% on average. An anticuckoldry strategy was evident in the male’s constant attendance at or near his […]
Vocal patterns in Ruddy Buntings
Chestnut Bunting (Emberiza rutila) Science Article 1 abstract In the present study, we reveal the control pattern of different level vocal nuclei (HVC and DM) in songbirds by electrical stimulation and acoustic analysis methods. The results show that both HVC and DM show left-side dominance in vocal control pattern, providing the acoustic evidence for the […]
Moorhen gallinula chloropus females lay eggs of different size and b-carotene content
Common Gallinule (Gallinula chloropus) Science Article 5 abstract In birds, carotenoids deposited in the eggs can influence the progeny?s prospects of survival. As a potentially limiting resource, carotenoids should be allocated optimally by the mother during egg production. The Moorhen Gallinula chloropus produces large clutches. We tested if females differ in their allocation of macronutrients […]
Body mass fluctuations and mortality in Common Tern Sterna hirundo chicks dependent on weather and tide in the wadden sea germany.
Common Tern (Sterna hirundo) Science Article 5 abstract In three Common Tern colonies in the German Wadden Sea the relationships between mortality, body mass of chicks, weather and the tide-dependent change in the daily span of time favourable for feeding (TFO-DH) were studied. On the island Oldeoog weather fluctuations between years were more pronounced and […]
Occurrence of the Cattle Egret, Bubulcus i. ibis, in Surinam
Cattle Egret (Bubulcus ibis) Science Article 6 abstract The first record of the Cattle Egret in Surinam on March 10, 1946 (Auk, 64: 143, 1947) proved of more importance than the mere observation of a straggler. In the same district I observed on December 12, 1946, two individuals on the bank of the Nickerie River. […]
Cattle Egret Bubulcus ibis habitat use andassociation with cattle
Cattle Egret (Bubulcus ibis) Science Article 5 abstract Cattle Egret Bubulcus ibis has a worldwide distribution. In India it is common in a variety of habitats, especially wetlands, throughout the peninsula. Freshwater marshes and paddy fields were identified as the most important foraging habitats by Meyerricks (1962) and Seedikkoya (2004), although there are pronounced seasonal […]
Naturally occurring secondary nutritional hyperparathyroidism in cattle egrets (bubulcus ibis) from central texas
Cattle Egret (Bubulcus ibis) Science Article 4 abstract Naturally occurring secondary nutritional hyperparathyroidism is described in the nestlings of two colonies of cattle egrets (Bubulcus ibis) from Central Texas (Bryan and San Antonio, Texas, USA). Nestlings from a third colony (Waco, Texas, USA) were collected in a subsequent year for comparison. Birds from the first […]