Cattle Egret (Bubulcus ibis) Science Article 1 abstract The copulatory behavior of the Cattle Egret (Bubulcus ibis) was observed in a heronry in central Japan. In 38 of 147 extramarital copulation (EC) attempts with seven females, the males seemed to succeed in ejaculation. There were relatively few complete ECs prior to egg laying, because females […]
Category: Eurasia
Cattle egrets bubulcus ibis at sea in the south atlantic ocean
Cattle Egret (Bubulcus ibis) Science Article 2 abstract While aboard the icebreaker Almirante Irizar, 12 Cattle EgretsBubulcus ibis were observed in the South Atlantic Ocean. Twowere seen on 8 March 1995 at 58 deg 31’S, 52 deg 11’W flying northwestabout 160 miles from the Argentine coast. On 12 March1995, a flock of nine individuals were […]
Nest Site Selection and Breeding Success by Cattle Egretand Little Egret in Amroha, Uttar Pradesh, India
Cattle Egret (Bubulcus ibis) Science Article 7 abstract The breeding success of the Cattle Egret ( Bubulcus ibis ) and Little Egret ( Egretta garzetta ) was studied in relation to nest site selection. Average nest abundance for the Cattle Egret was 0.045
Role of sibling aggression in food distribution to nestling cattle egrets (bubulcus ibis)
Cattle Egret (Bubulcus ibis) Science Article 9 abstract Sibling aggression occurs in a wide variety of asynchronously hatching bird species. In some, fights among siblings lead inevitably to death, in which case the benefits of winning are clear. In species where sibling aggression is common but usually not fatal,the benefits gained by winning and the […]
Predation on the Cattle Egret (Bubulcus ibis) and consumption of theCampo Flicker (Colaptes campestris) by the Aplomado Falcon (Falcofemoralis) in Brazil
Cattle Egret (Bubulcus ibis) Science Article 8 abstract The Aplomado Falcon (Falco femoralis) has a wide distribution ranging from south-east USA to Tierra del Fuego (Ferguson- Lees and Christie 2001). This small raptor (208 – 460 g) inhabits mostly non-forested habitats, such as savannah grassland, scrub steppe, cactus desert, marshland with scattered trees, and sometimes […]
Courtship feeding between Yellow-legged Gull Larus cachinnans and Herring Gull L. argentatus in the Western Mediterranean
Yellow-legged Gull (Larus cachinnans) Science Article 1 abstract Several species of large white-headed gulls, genus Larus, often hybridize freely where they occur sympatrically (Ingolfsson 1987, Pierotti 1987, Spear 1987, Pierotti & Annett 1993). In the Ebro Delta (Ebro Delta National Park, 40
Predation by a Marsh Harrier Circusaeruginosus on Yellow-legged GullLarus michahellis nests
Yellow-legged Gull (Larus cachinnans) Science Article 3 abstract This note reports a case of predation by an adult female Marsh Harrier Circus aeruginosus onthree nests of Yellow-legged Gulls Larus michahellis at the Ebro Delta. The predation wasobserved on 4 April 2002 on one of the dykes that separate the saltpan-heaters of La Trinitat(Punta de la […]
Deconstructing myths on large gulls and their impact onthreatened sympatric waterbirds
Yellow-legged Gull (Larus cachinnans) Science Article 2 abstract Owing to increasing population trends and facultative predatory habits, large gullshave been identified as significant agents of change in the alteration of manyecological communities. Often, they are perceived as negatively impacting thepopulation trends of most sympatric waterbirds. Consequently, culling programshave been implemented to remove adults, chicks and […]
Effects of predation risk on diurnal mass dynamics and foraging routines of yellowhammers (Emberiza citrinella)
Yellowhammer (Emberiza citrinella) Science Article 6 abstract Theoretical models predict that when having fat reserves is costly in terms of predation risk, birds should decrease their levels of fat reserves in response to increased predation risk. I performed an experiment in which yellowhammers were exposed to a control treatment, where a curtain was moved several […]
Use of field margins by foraging yellowhammers Emberiza citrinella
Yellowhammer (Emberiza citrinella) Science Article 3 abstract Some agri-environment schemes promote the creation and management of a variety of non-crop habitats on farmland inthe UK, yet there has been relatively little monitoring to assess how species, particularly birds, use these habitats. The presentstudy deals with a declining UK farmland bird species, yellowhammer Emberiza citrinella, and […]