On December 6, 1997 Ireland released a one pound, small format, one pane booklet of stamps (Hibernia #HB61) as part of its ongoing "native birds" eighth definitive series. The two different stamps are a 32 p peregrine falcon (Falco peregrinus) and a 4 p corncrake (Crex crex).
Ireland continued its "birds" series after switching to euro currency use, and released a similar, two euro booklet (Hibernia #HB113) on September 30, 2003. The euro-denominated 48c falcon and 4c corncrake are a little browner in color than the older stamps.
The corncrake, or corn crake is also known as landrail in part of its wide range throughout Eurasia and Africa. It is a threatened species in Western Europe.
Regarding the peregrine falcon Wikipedia says, "A large crow-sized falcon, it has a blue-gray back, barred white underparts, and a black head. The peregrine is renowned for its speed, reaching 320km/h (200mph) during its characteristic hunting stoop (speed dive)...the only major ice-free landmass from which it is entirely absent is New Zealand."