TY  - GEN
AU  - Andersson,M
TI  - Why are there so many threat displays?
SN  - 0022-5193
PY  - 1981///0915
KW  - Aggression
KW  - Agonistic Behavior
KW  - Animal Communication
KW  - Animals
KW  - Birds
KW  - Humans
KW  - Models, Biological
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1016/0022-5193(80)90310-0
ER  -