Sentence examples for bird index from inspiring English sources

The breeding farmland bird index was at half – 50 per cent – of its 1970 level in 2011, the lowest level ever recorded – which means that just in the time since the breakup of the Beatles, half of the birds visible on a typical country walk have vanished.

These studies can also validate and update the local bird index of hot springs initiated by the investigators.

Eighteen farmland bird species were recorded, of which 10 are included in the Polish Farmland Bird Index.

The EU has adopted the European Farmland Bird Index (EFBI) as a Structural and Sustainable Development Indicator and a proxy for wider biodiversity health on farmland.

We assessed changes in bird communities based on the predicted changes in agricultural land use and climatic suitability using various indicators, including the European Farmland Bird Indicator (FBI) and the Community Specialisation Index (CSI).

In addition, the bird diversity index was not showing strong correlation with each other too.

The Bird Community Index was high in one area near the source of Nescopeck Creek.

The Bird Community Index, a measure of the quality of a habitat based on the presence of songbirds, has been tested for most of the watershed of Nescopeck Creek.

Using data for 18 species of passerine bird, two indices of intraspecific variation in sperm morphology (sperm length and sperm design; see Methods), and two indices of postcopulatory sexual selection (relative testes size and extrapair paternity level), we found clear support for this hypothesis.

Rather, local bird ecological indices should be explored, otherwise, erroneous predictions of the anthropogenic impacts will continue to be common.

Fig. 4 The influence of water temperature on bird biotic indices in 12 hot spring sites in East Amhara Region, Ethiopia, 2013.