Issued in 2013, the stamps belong to a set of four feauturing Australian species of kingfishers.

The first stamp depicts a male blue-winged kookaburra (Dacelo leachii). Males have blue tails while females have rufous ones. It has four subspecies. It feeds on insects, spiders and other arthropods, lizards, frogs, fish, earthworms, rodents and small birds.

The second stamp shows a sacred kingfisher (Todiramphus sanctus), which has been discussed in the past.

 

Issued in 1997, this maximum card feautures the brolga (Antigone rubicunda), a species of crane native to Australia and New Guinea. It is omnivorous, feeding on both plant material and invertebrates as well as frogs and lizards.

Thank you Jemma for this aerogamme from Australia.
Wandering Whistling-duck (Dendrocygna arcuata): This whistling duck can be found in subtropical and tropical Australia, in the Pacific Islands, Indonesia, Philippines and Papua New Guinea. It has three subspecies. It is classified as least concerned and it feeds on grass, waterlillies, water plants, aquatic vertebrates and insects. It is a migratory species.

Thank you Heather for this card from Australia. The lower two values of the four 2009 Songbirds of Australia stamps are used for postage.
Green Catbird (Ailuroedus crassirostris): This bowerbird is endemic to the east coast of Australia where it lives in subtropical forests. It feeds on fruit and flowers.
Noisy Scrub-bird (Atrichornis clamosus): It is also endemic to Australia. It lives in temperate shrubland but due to habitat loss it is threatened and for a while in the past it was considerated exctinct.