There’s this great website called which is a collection of free silhouette images, either public domain or creative commons, depending on the person who submitted it.
Lots of people have been pitching in and we’re at over 2000 images now, but there’s still a whole lot more lifeforms left to do! Think of it as a giant pokédex for real life animals, and you’re helping people too! Anyone can pitch in, if you’ve got some spare animal photos that you have taken yourself, just trace over them as a vector or in a raster format and submit them!
These silhouettes are super useful for all sorts of things, but the main idea is to represent different lifeforms on a phylogenetic tree. Phylopic has some exciting features such as the ability to see the relationship between two organisms in a pictorial fashion.
I really suggest you check it out!

A phylogeny of maniraptors - a gift for albertonykus for being awesome :D

Whipped up from recent avian phylogenies & Dr. Holtz’ Theropod cladograms. Green = extant lineages, brown = extinct. Yeah, the non-avian maniraptors are a little sparse, I apologize for that, but one of my main goals was to create a ‘consensus’ of multiple trees. The birds relationships are slowly stabilizing, but we have a long way to go.

Any inaccuracies or changes, please let me know.

Images from PhyloPic -

Quick ‘n’ dirty picture showing what I know off of the top of my head of tyrannosaurid integument–green is glabrous, red is scaly. Images are from Phylopic, top is Tyrannosaurus rex (Scott Hartman), middle is Tarbosaurus baatar (Matt Martyniuk), bottom is Albertosaurus libratus (Craig Dylke). More impressions are known for Tyrannosaurus rex and Albertosaurus libratus; Tyrannosaurus rex’s integument might be glabrous rather than scaly.

Simplified phylogeny of birds and their extinct relatives (extinct forms indicated with a dagger). Aves represents the group of extant birds, their most recent common ancestor, and all of that ancestor’s descendants: the crown group. All groups sharing a more recent common ancestor with Aves than with their closest living relatives (Crocodylia) are part of the stem. Some stem-members share most but not all of the traits of modern birds: Ichthyornis retains teeth, but otherwise has a relatively modern anatomy. But more distant groups have proportionately fewer traits of modern birds. Silhouettes from, from the contributors Andrew Farke, FunkMonk, Scot Hartman, Lukasiniho, Matt Martyniuk, Steve Traver, and Emily Willoughby. Silhouettes not to scale

PhyloPic: 500 Million Years, 44 Silhouettes

Sometimes you just have to love the internet.

Specifically, I love when collaboration results in something wonderful and educational. PhyloPic is a site where you can find free Public Domain/Creative Commons silhouettes of organisms. They’re submitted by artists volunteering their time and talent for educators and well, anybody to use. And now there’s a t-shirt you can buy to help support PhyloPic.