Natural history (6) Birds (6) Year (5) Life (5) Earth (Planet) (5) Average (5) Ciencias naturales (5) Terre (5) Vie (5) Sciences naturelles (5) histoire naturelle (5) vie (5) terre (5) Sénégal (4) Reproduction (4) Months (4) Immigrants (4) Population (4) Sénégal (4) espèce (3) Breeding (3) Area (3) Price-earnings ratio (3) Biomass (3) Area (3) Species (3) Seeds (3) Rain and rainfall (3) Pension trusts (3) Migrant agricultural laborers (3)