Kentish Plover (Charadrius alexandrinus) Science Article 3 abstract Female kentish plovers Charadrius alexandrnus typically desert their broods after the chicks hatch, i.e. 1 4 weeks before the chicks fledge or become independent. In this paper we investigate the costs and benefits of desertion for females. Desertion incurs a cost for females: following desertion chick survival […]
The mating system of Kentish Plovers Charadrius alexandrinus
Kentish Plover (Charadrius alexandrinus) Science Article 6 abstract Kentish Plover Charadrius alexandrinus pairs generally re-nest together after the loss of a clutch. In contrast, two females who hatched clutches changed mates before re-nesting, thus proving sequential polyandry. Observations of adults accompanying broods show that females normally desert the brood about a week after hatching. The […]
Status of Kentish Plover(Charadrius alexandrinus) in Hungary
Kentish Plover (Charadrius alexandrinus) Science Article 7 abstract Population size, distribution and reproductive success of Kentish Plovers in Hungary are sum-marised. 105-140 pairs bred in 1988-1992. Two breeding sites (Miklapuszta and Southern Hun-gary) contained the bulk of the population, with 60-80 pairs and 35-40 pairs, respectively. Thenumber of breeding pairs has declined in recent years. […]
Gliding flight in a jackdaw: a wind tunnel study
Jackdaw (Coloeus monedula) Science Article 1 abstract We examined the gliding flight performance of a jackdaw Corvus monedula in a wind tunnel. The jackdaw was able to glide steadily at speeds between 6 and 11ms?1. The bird changed its wingspan and wing area over this speed range, and we measured the so-called glide superpolar, which […]
Within-clutch repeatability of egg dimensions in the jackdaw Corvus monedula: a study based on a museum collection
Jackdaw (Coloeus monedula) Science Article 2 abstract Variation in size and shape of the jackdaw (Corvus monedula) eggs was studiedon egg’s museum collection data from Bardejov region, NE Slovakia, from1961 to 1964. Mean clutch size was 4.14 1.29 (n = 125). Coecients of variationfor clutch means ranged from 1.67 (breadth) to 4.85 (volume). Meanrepeatability […]
Capturing Jack Snipe Lymnocryptes minimus with mobile horizontally held nets
Jack Snipe (Lymnocryptes minimus) Science Article 1 abstract The biology of the Jack Snipe Lymnocryptes minimus is poorly known and recent estimates of its population size are contradictory. To encourage ringing and marking studies of this cryptic species, we tested and improved a trapping technique in the Camargue during winter and migration periods. This capture […]
Ivory Gull (Pagophila eburnea) Distribution in Late Summer and Autumn in Eastern Lancaster Sound and Western Baffin Bay
Ivory Gull (Pagophila eburnea) Science Article 1 abstract Ivory gulls in western Baffin Bay and eastern Lancaster Sound were studied in 1976, 1978 and 1979 using aerial surveys. uring September and October concentrations of hundreds of ivory gulls occurred along glacier fronts on southeast Ellesmere and northeast and southeast Devon islands, and where offal was […]
Male Parental Care and Extrapair Copulations in the Indigo Bunting
Indigo Bunting (Passerina cyanea) Science Article 6 abstract Levels of parental care by male Indigo Buntings (Passerina cyanea) were predicted to be lower and the tendency to pursue extrapair matings greater when (1) the opportunity of additional matings (extrapair copulations) was high, (2) the male was cuckolded, and (3) the clutch or brood size was […]
A NEW HYBRID BUNTING (PASSERINA CYANEA x PASSERINA CIRIS)
Indigo Bunting (Passerina cyanea) Science Article 2 abstract FOUR buntings of the genus Passerina breed in the United States: Indigo (P. cyanea), Lazuli (P. amoena), Varied (P. versicolor), and Painted (P. ciris). WALTER KINGSLEY TAYLOR, The Auk 91: 485-487. July 1974 Download article download full text (pdf)
Replaced primaries in first nuptial plumage of Passerina cyanea.
Indigo Bunting (Passerina cyanea) Science Article 3 abstract Dwight pointed out (1900, p. 211 et seq.) long ago that the Indigo Bunting replacessome outer primaries at the postjuvenal molt. These replaced primaries (in the male) have blue outer vanes contrasting sharply with the blackish outer vanes of the juvenal primaries, except that primary 9 has […]