In my 5 days in Cairns during the last week I observed 6 bird species that were new to me.
Laughing gull - a resident of north and south America that is a very rare vagrant to Australia. It may have taken a wrong turn across the Pacific or followed a ship here. Here is a good YouTube of an adult laughing. The bird I saw on The Esplanade Cairns was an immature without the black head. It was a smudged, greyish gull with conspicuous white eyelips. (I would only have seen this because I had prior notification it was there!)
Terek sandpiper - a migrant from Finland and Northern Siberia with a distinctive up-turned bill. Seen on occasion at various parts of Australian coastline and even inland but one I have always missed. Fairly scarce worldwide - here is a YouTube from Hungary. Again spotted on The Esplanade mudflats.
Lesser crested tern - is probably sedentary to Australia though elsewhere is nomadic. Very orange bill. Here is a YouTube of it with other species. A bit scarce onshore - I saw this on a sandspit near a crocodile-infested estuary near Mossman with Silver gulls, Pied oystercatchers and a few Godwits.
White-throated honeyeater - I'll bet I've seen this before but confused it with White-naped which has the slightest black chin and, in eastern Australia, a red-eye crescent. I saw several instances of this in woodlands a bit inland from Mount Molloy with at least 5 other species of honeyeater and with both a male and female Cicadabird. I had not seen a female Cicadabird before.
Buff-breasted paradise kingfisher (yes, it is at Jennifer Marohasy's site). On a dirt road heading south about 5 to 6 klm east of Julaten I saw at least 20 observations of adults and juveniles. One of Australia's most beautiful birds. Not rare but I have often missed it on previous treks to Cairns because I was there wrong season. Migrates from New Guinea. Nests in termite mounds - I saw many with one having been subject to goanna attack. This gorgeous YouTube is a good still study. You are not a fully-fledged Aussie until you have seen this beautiful bird! Orgasmic.
Lesser (Mongolian) sandplover - a migrant from Asia/Mongolia/Siberia. Not rare in Australia - regularly in the low thousands at certain locations - but often just a few birds and small/difficult to distinguish from Greater sandplover unless alongside them. Here is a YouTube. Again I spotted several examples of this bird on The Esplanade.
These all get added to my lifelist.