Flooded rice fields can provide habitats for wetland species and ecosystem services similar
to those of natural wetlands. During the last three decades, however, farming practices and …

To examine the population trends of grassland and shrub birds in Hokkaido, we conducted
line transect censuses in 2002 and 2003, in area where avifaunal studies had been …

Modernization of drainage systems is suspected of causing a deterioration in the biodiversity
of paddy-dominated landscapes that are substitutes for natural wetlands. Here, we focused …

To determine large scales habitat suitability for focal species, habitat models derived from
one region are often extrapolated to others. However, extrapolation can be inappropriate …

Crossing water bodies during migration is generally challenging for raptors (Kerlinger 1989,
Bildstein 2006, Newton 2008). Many raptors have been observed to be exhausted or have …

Biodiversity has a hierarchical structure, consisting of genetic, species, and ecosystem
levels. Although the importance of genetic and species diversities is well recognized from …

Migration can be costly with consequences that can influence population trajectories. These
costs and consequences are especially heightened during over-water travels, which can be …

In studies of habitat suitability at landscape scales, transferability of species-landscape
associations among sites are likely to be critical because it is often impractical to collect …

One juvenile raptor which was not able to be identified due to its head damage was
discovered on a roadside in Janggok-ri, Jori-eup, Paju on 28th June, 2011. The species was …

The grey-faced buzzard (Butastur indicus) is a raptor that inhabits East Asia, including
Japan. Because the number of individuals has decreased by 75% over the last 40 years, this …