Swallow-tailed Kite (Elanoides forficatus) Science Article 2 abstract Snyder( 1974) has described the breeding biology of the Swallow-tailed Kite (Elanoides forficatus). My observations of their pre-nesting behavior, made while staying at the Archbold Biological Station at Lake Placid, Florida, confirm his on copulations,courtship feeding, and nest-building Lawrence Kilham, Raptor Research 14(1):29-31 Download article download full […]
Category: North America
Incubation capacity and clutch size determinationin two calidrine sandpipers: a test of the four-egg threshold
Semipalmated Sandpiper (Calidris pusilla) Science Article 3 abstract Several groups of vertebrate taxa, including shorebirds, are unusual in that they produce a x number of offspring. The aim of this study was to examine whether the incubation capacity of western sandpipers (Calidris mauri) and semipalmated sandpipers (C. pusilla) limits their maximum clutch size to four […]
Body mass and acquisition of breeding plumage of wintering Calidris pusilla in the coast of Pernambuco, north-eastern Brazil.
Semipalmated Sandpiper (Calidris pusilla) Science Article 4 abstract No abstract Fedrizzi, C.E., S.M. de Azevedo Jr, and M.E.L. de Larrazabal, Revista Brasileira de Zoologia 21:249-252. Download article download full text (pdf)
Site Safety and Food Affect Movements of Semipalmated Sandpipers(Calidris pusilla) Migrating Through the Upper Bay of Fundy
Semipalmated Sandpiper (Calidris pusilla) Science Article 2 abstract The upper Bay of Fundy is a critical stopover site for Semipalmated Sandpipers (Calidrispusilla) during their fall migration. However, little is known about factors that influence selection of feeding and roosting sites by these birds, or the extent to which birds move between different sites during their […]
The structure of aerial displays in three species of calidridinae (scolopacidae)
Semipalmated Sandpiper (Calidris pusilla) Science Article 1 abstract Sandpipers in the subfamily Calidridinae (Scolopacidae) breed in the Arctic and Subarctic. In all species, unpaired males engage in distinctive aerial displays. Such displays are described for three species: Dunlin (Calidris alpina L.), Semipalmated Sandpiper (Calidris pusilla L.), and Stilt Sandpiper(Calidris himantopus Bonaparte). EDWARD H. MILLER, The […]
Agonistic behavior of breeding purple gallinules porphyrula martinica: potential ecological correlates
Purple Gallinule (Porphyrio martinica) Science Article 2 abstract Purple gallinules Porphyrula martinica are territorial birds that breed in natural ponds with abundant aquatic vegetation as well as in rice fields. Observations of the aggressive behavior during the breeding season conducted on a rice field and on a naturally flooded savanna (estero), in the Central Llanos […]
Feeding ecology of the purple gallinule (Porphyrula martinica) in the central llanos of Venezuela.
Purple Gallinule (Porphyrio martinica) Science Article 3 abstract The food habits of purple gallinules (Porphyrula martinica) were studied through direct observation in the Central Llanos of Venezuela during the rainy season of 1988, from August to December. Purple gallinules consumed an average 56.6% of plant food Zaida Tarano, Ectropicos, vol. 8, no. 1-2, pp. 53-61, […]
Which method is most suitable for censusingbreeding populations of red-backed (Laniuscollurio) and great grey (L. excubitor) shrikes?
Northern Shrike (Lanius excubitor) Science Article 7 abstract Up to now, studies have shown that it is very difficult to estimate accurate numbers of shrike(Lanius spp) breeding pairs. During our shrike biology research in Western Poland this problemwas evident. Actual breeding pair numbers were derived from a combination of specialcounts in the pre-breeding period, intensive […]
Non-breeding site fidelity in northern shrikes
Northern Shrike (Lanius excubitor) Science Article 3 abstract Band-recovery data were examined for evidence of interseasonal non-breeding site fidelity in the Northern Shrike (Lanius excubitor), an irregular, long-distance migrant to the northern temperate zone. Despite the low rate of recapture (0.9%) of banded Northern Shrikes in subsequent years, recovery data revealed that 12 individuals were […]
Food consumption and roosting behaviour of Great Grey Shrikes Lanius excubitor wintering in south-western Finland.
Northern Shrike (Lanius excubitor) Science Article 10 abstract For diurnal predators the short time of winter daylight may limit the possibilities to feed and hunt. In this field study, these aspects, as well as roosting behaviour,were evaluated in wild Great Grey Shrikes (Lanius e. excubitor). The main roost-sites were large junipers (Juniperus communis) and willows […]