Screechers Wild! is a line of spring loaded, 360 degree flipping, transforming animal vehicles from Alpha Toys. While I haven't been able to find much info online about the parent company, you can watch animated episodes on YouTube that help tell the Schreechers Wild story. Think part Beyblade/Yu-Gi-Oh!/Pokemon in the sense it revolves around children/trainers that battle others. The toys are part Transformers/Hot Wheels. Each toy comes packaged with little discs that when the car "captures" then, they are flung into the air and automatically transform into different type of creatures...all while executing a 360 degree flip!
These Screechers are near the size of your average Hot Wheels car
These Screechers take the it to the next size and feature larger vehicles/animals
These Screechers are the largest and can capture two discs at the same time
In addition to the single packaged Screechers, there were larger toys/playsets and launchers
Fossil Fire Stunt Set
Rapid Fire Disc Blaster
Schreechers Speed Launcher