Identify by airplane characteristics

The Su-57 is the Russian counterpart of the F-22 and also a look-a-like. The Sukhoi has round exhausts with space in between, air intakes under the wings and vertical stabilisers that are nearly triangular.

The combination of high and parasol wings with an engine in between, above the fuselage, is typical for more Supermarine amphibian biplanes, but only the Seagull V aka Walrus has a pusher propeller. The gear is retracted sideways in the lower wings.

One of the most famous fighters of the second World War is especially recog­nised by its elliptical wings, a liquid cooled engine in the front and rectangular radiators underneath the wings. The main landing gear retracts outward in the wings. Most versions have a short of "blown up" canopy.

The tail is a key recognition point of this biplane seaplane, as the Stranraer has a low single vertical fin at the bottom, with horizontal stabilisers on top and double vertical fins on top of that. You'll also have to look for radial piston engines in the leading edge of the upper wings. Furthermore, it has wider span upper wings than lower wings, both with rounded tips. 

The Swift fighter is characterised by semi circular air intakes at th side of the fuselage, below the canopy. Furthermore, it has a single long nose gear door. The slightly curved leading edge of the fin ends in a long dorsal fin. This vertical fin is placed nearly in front of the horizontal stabiliser, which have a noticeable dihedral. (photo: RuthAS/WikiMedia)

The first of the Swearingen Merlin family used the wings of Beech Queen Air and single wheel main gear of the Twin Bonanza, but already has the distinctive cockpit windows of the rest of the Merlin and Metroliner series.

The Merlin III is the short body version of the Metroliner commuter aircraft. It has the same nose, undercarriage, tail and engine nacelles, but larger cabin windows. 

The key features of the Metroliner commuter aircraft are the long fuselage with long nose and horizontal stabilisers attached to the dorsal fin. There is als a short body Merlin version, which has larger cabin windows.

The configuration of the SJ30 is pretty standard with a low-mounted wing, engines attached to the fuselage and a T-tail. Unusual, however, are the legs of the main landing gear, which look somewhat like those of a Jaguar fighter. Also look at the leading edge of the vertical stabiliser, curved al the way to the trailing edge.

This turboprop trainer has a stubby appearance, a tail like the PC-9M (so with a large dorsal fin), a two piece canopy, wings with continuous dihedral and on most versions small winglets.