Coccidia of whooping cranes.

Area of Science:

• Avian wildlife health
• Parasitology
• Ornithology

Background:

• Coccidiosis is a parasitic disease affecting birds.
• Whooping cranes (Grus americana) are an endangered species requiring conservation efforts.
• Understanding parasite prevalence is crucial for managing wild and captive bird populations.

Purpose of the Study:

• To investigate the prevalence of coccidial oocysts in free-ranging and captive whooping cranes.
• To identify specific Eimeria species infecting whooping cranes.
• To assess coccidia prevalence in sandhill cranes sharing habitats with whooping cranes.

Main Methods:

• Fecal samples were collected from free-ranging and captive whooping cranes.
• Microscopic examination of fecal samples to detect and identify coccidial oocysts.
• Comparison of coccidia prevalence between whooping cranes and sympatric sandhill cranes.

Main Results:

• Coccidial oocysts were detected in 6/19 free-ranging and 4/16 captive whooping cranes.
• Eimeria gruis and Eimeria reichenowi were identified in whooping cranes.
• Isospora lacazei was considered a spurious finding in captive cranes.
• Eimeria oocysts were also prevalent in Canadian sandhill cranes from the same wintering grounds and in captive sandhill cranes.

Conclusions:

• Coccidia, particularly Eimeria species, are present in both wild and captive whooping crane populations.
• Sandhill cranes may act as reservoirs or share common environmental sources of Eimeria infection.
• Parasite surveillance is important for the health and conservation of whooping cranes.