Bronzy Hermit (Glaucis aeneus) Science Article 1 abstract On 10 January 1968I walked on a sand ridge between two swamps north of Paramaribo, Surinam, when Isaw two Rufous-breastedH ermits (Gla cis hirs ta) in an aerial fight that ended withone bird hotly pursuing the other. I took no special notice of it as this is […]
Autumn migration of the Broad-billed Sandpiper Limicola falcinellus on the southern Baltic Coast
Broad-billed Sandpiper (Limicola falcinellus) Science Article 1 abstract Broad-billed Sandpipers Limicola falcinellus were counted and trapped in Puck Bay on the southern Baltic coast in autumn. The number of arriving birds varied greatly between years. The observed pattern was not completely convergent with data gathered at Ottenby, Sweden, 220 km north of Puck Bay. It […]
Historical changes in black brant Branta bernicla nigricans use on Humboldt Bay, California
Brant Goose (Branta bernicla) Science Article 1 abstract We examined 70 years (1931-2000) of black brant Branta bernicla nigricans abundance on Humboldt Bay, California. We used linear regression to convert count data to a standard variable (use-days) for evaluating hypotheses that explain temporal trends in brant use. Winter and spring brant-days on Humboldt Bay declined […]
The applicability of age ratio and brood size counts in population dynamic studies of the Brent Goose Branta bernicla bernicla.
Brant Goose (Branta bernicla) Science Article 3 abstract In wintering Brent Geese, annual assessments of the proportion of juveniles and the mean brood size have been made since the 1950s, allowing population dynamic analyses. Field procedures have never been quantitatively explored and were studied in four areas along the Dutch Wadden Sea in 1975/76. Juveniles […]
Food exploitation patterns by Brent Geese Branta bernicla during spring staging.
Brant Goose (Branta bernicla) Science Article 4 abstract The exploitation pattern of a salt marsh community by Brent Geese in spring is discussed. The two main vegetation types on the salt marsh, one dominated by Puccinellia maritima and the other characterized by the presence of Plantago maritima and Triglochin maritima, are grazed very intensively, so […]
Dark-bellied Brent Geese Branta bernicla bernicla in Britain, 1976-1987.
Brant Goose (Branta bernicla) Science Article 5 abstract The numbers of Dark-bellied Brent Geese wintering in Britain have increased from 47 500 in 1976-77 to 90-95 000 in the early and mid-1980s. The proportion of the European population in Britain had been largely constant during this time, at 40-48%, though reaching 56-59% in some winters. […]
Inland pastures are an appropriate alternative for salt-marshes as a feeding area for spring-fattening Dark-bellied Brent Geese Branta bernicla.
Brant Goose (Branta bernicla) Science Article 9 abstract On the Dutch Wadden Sea island Texel, spring-fattening Dark-bellied Brent Geese Branta bernicla fed almost exclusively inland on improved grasslands, whereas the remainder of the flyway population utilised coastal salt-marshes elsewhere in the Wadden Sea. There are indications that inland pastures are ‘second choice habitat’ during this […]
The significance of female body stores for egg laying and incubation in Dark-bellied Brent Geese Branta bernicla bernicla
Brant Goose (Branta bernicla) Science Article 10 abstract The probability of successful breeding by Brent geese in the Arctic appears to be positively correlated with the mass of females when they depart from spring staging areas in North-western Europe. To clarify the mechanism behind this relationship we investigated the significance of flown-in female body stores […]
Dark-bellied Brent Geese Branta bernicla bernicla forego breeding when Arctic foxes Alopex lagopus are present during nest initiation
Brant Goose (Branta bernicla) Science Article 8 abstract In an area north of the Pyasina delta in Taimyr (Russia), nest distribution, nest initiation and breeding success of Brent Geese Branta bernicla bernicla were studied in six successive summer seasons from 1990-1995 in relation to lemming and Arctic Fox Alopex lagopus abundance. Lemming abundance conformed to […]
Differences in migratory pattern and habitat choice between social classes of the Brent Goose Branta bernicla bernicla.
Brant Goose (Branta bernicla) Science Article 2 abstract Age ratio (% juveniles) counts of Brent Goose flocks provide a crude index of their social composition (families versus subadults and failed breeders). In 1975/76, the possible impact of habitat and season was studied in four areas along the Dutch Wadden Sea. Sightings of birds colour-ringed in […]