a24f8ac4_uxent_Wildlife_Research_Center__Reference_on_Site
[Did You Know...] that the whooping crane is an endangered species and why? [Reference on Site] 
Several factors have harmed whooping cranes. The primary one is the loss of habitat. Wetlands have been drained for agriculture. Oil and gas development and the construction of intercoastal waterways for barge traffic are additional threats. More information...
Did you know? - Patuxent Wildlife Research Center
Reference on Site