Philippine Stamp: National Bird (Philippine Eagle)

The Philippine Eagle (Pithecophaga jefferyi) is a critically endangered eagle species endemic to the forests of the Philippines. 

The Philippine Eagle was discovered British naturalist John Whitehead in 1896 and was named after his father Jeffery Whitehead. The bird was originally called Monkey-eating Eagle, due to the previous belief that the eagle exclusively preyed on monkeys, hence the generic name Pithecophaga. 

On July 15, 1995, Fidel V. Ramos, then President of the Philippines, signed Proclamation No. 615, declaring the Philippine eagle as the national bird.

New Zealand Stamp: Kōkako

The Kōkako (Callaeas cinereus) is a forest bird which is endemic to New Zealand. It is slate-grey with wattles and a black mask. It is one of three species of New Zealand Wattlebird, the other two being the endangered Tieke (saddleback) and the extinct Huia. 

The Kōkako illustrated is a North Island Kōkako (Callaeas cinerea wilsoni). It has blue wattles while the South Island Kōkako (Callaeas cinerea cinerea) by contrast has largely orange wattles, with only a small patch of blue at the base.

The North Island Kōkako is now quite rare—barely surviving its orange-wattled South Island cousins, considered today to be extinct. Kōkako populations throughout New Zealand have been reduced by the predations of mammalian invasive species such as possums, stoats, cats and rats and their range has contracted significantly. 

U.S. Stamp: Red-headed Woodpecker

The Red-headed Woodpecker, Melanerpes erythrocephalus, is a small or medium-sized woodpecker from temperate North America. Their breeding habitat is open country across southern Canada and the eastern-central United States.