Geo- og miljøvidenskab
food limitation
93%
breeding season
79%
population decline
72%
agricultural land
49%
egg
19%
food supplementation
19%
habitat
19%
invertebrate
17%
clutch size
15%
young
14%
Europe
14%
local extinction
12%
food availability
12%
habitat type
11%
bird species
11%
nest
11%
agricultural practice
11%
breeding
10%
contraction
9%
twenty first century
9%
energetics
9%
land cover
8%
parameter
7%
productivity
7%
rate
6%
temperature
3%
distribution
3%
Landbrug og biologi
Athene noctua
100%
Denmark
67%
agricultural land
60%
breeding season
54%
habitats
36%
invertebrates
26%
survival rate
25%
land cover
20%
clutch size
16%
fledglings
16%
food availability
15%
extinction
14%
demographic statistics
14%
oviposition
13%
nests
12%
foraging
12%
birds
9%
breeding
9%
eggs
9%
temperature
6%