A red-bellied fruit dove (Ptilinopus greyi) at the Zoo Berlin.
An orange-bellied fruit dove (Ptilinopus iozonus humeralis) at the Zoo Berlin.
Wonga pigeon (Leucosarcia melanoleuca ) at the Houston Zoo. This male likes to sit in the smallest nest (intended for finches) in the enclosure even when there are no eggs.
A white-eyed imperial pigeon (Ducula perspicillata perspicillata) at the Houston Zoo.
A male Peruvian pigeon (Patagioenas oenops) at the Cincinnati Zoo.
Chestnut naped imperial pigeon (Ducula aenea paulina) at the Exmoor Zoo.
A yellow-footed green pigeon (Treron phoenicopterus annamensis) at Phnom Tamao Wildlife Rescue Center – Wildlife Alliance.
A chestnut-naped imperial pigeon (Ducula aenea paulina) at the Plzen Zoo in the Czech Republic.
Pink necked green pigeon (Treron vernans) at the Plzen Zoo in the Czech Republic.
White imperial pigeon (Ducula luctuosa) at the Plzen Zoo in the Czech Republic.
A green imperial pigeon (Ducula aenea polia) at Penang Bird Park.
Green imperial pigeon (Ducula aenea aenea) at the Plzen Zoo in the Czech Republic.
Pink-headed imperial pigeon (Ducula rosacea) at the Plzen Zoo in the Czech Republic.
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