Illinois Waterfowl Surveys and Investigations Annual Report for W-43-R-59

Agriculture & Biology

• Illinois River 100%
• waterfowl 70%
• reports (publications) 65%
• river valleys 63%
• Aythya affinis 62%
• nests 35%
• Mississippi River 33%
• Haliaeetus leucocephalus 30%
• Ardea herodias 27%
• Ardea alba 21%
• wetlands 20%
• ducks 17%
• birds 16%
• eagles 12%
• habitats 11%
• invertebrates 8%
• habitat conservation 8%
• Fulica americana 5%
• Ohio River 5%
• foraging 5%
• ecology 5%
• winter 4%
• shorelines 4%
• forage quality 4%
• aircraft 3%
• space and time 3%
• food availability 3%
• seed weight 3%
• planning 3%
• preserves 3%
• tubers 3%
• legs 3%
• flight 2%
• geographical distribution 2%
• rivers 2%
• summer 2%
• monitoring 2%