Boas kill by cutting off blood flow, not airflow

The rainbow boa Epicrates cenchria (shown) probably kills its prey by cutting off its captive's blood flow, not by suffocating it, as scientists had suspected.
karoH/Wikimedia Commons (CC BY-SA 3.0)
The rainbow boa Epicrates cenchria (shown) probably kills its prey by cutting off its captive's blood flow, not by suffocating it, as scientists had suspected.
karoH/Wikimedia Commons (CC BY-SA 3.0)