Sentences with phrase «overall numbers of birds»
Mixed forests, however, harbored more bird species and similar overall numbers of birds compared with cropland.
https://www.sciencedaily.com/ Not exact matches
A study by Rhône - Poulenc (1997) has shown a steady annual increase in the number of bird territories on land converted to organic production and a higher overall number of territories on the organically managed land.
He says overall, the number of birds and small animals being killed are high enough that cats and their hunting could be causing some wildlife populations to decline in some areas.