Agriculture & Biology
woodlots
87%
migratory birds
86%
temperate zones
79%
habitat fragmentation
76%
Hylocichla mustelina
59%
songbirds
56%
nests
48%
logging
39%
predation
38%
parasitism
32%
clearcutting
31%
censuses
26%
breeding sites
23%
Molothrus
21%
forest roads
18%
national forests
16%
silvicultural practices
16%
deforestation
14%
eggs
14%
immigration
13%
fecundity
10%
survival rate
9%
birds
7%
Earth & Environmental Sciences
songbird
100%
fragmentation
64%
selective logging
34%
parasitism
32%
nest
26%
nest predation
24%
clearcutting
19%
population decline
18%
effect
17%
breeding
16%
census
15%
egg
15%
predation
15%
rate
13%
migratory bird
10%
sensitive area
10%
habitat
9%
fecundity
9%
immigration
9%
deforestation
7%
harvest
7%
regeneration
7%
bird
6%
mortality
6%
road
5%
need
4%