Perplex City: Season 1, Cards #037 - #040

Continuing my Perplex City solutations. Spoilers!

• #037 - Muscae Volitantes: Another pictogram (ideograms? neitherograms? netherregionograms?) The text in the image looks like GOOD. Learned something useful with this card (and this is one of the grandest gifts that Perplex City is giving me): "muscae volitantes" is Latin for "those goddamn things that float in front of my eyes". In actuality, the hidden word is "Wood", and, with enough effort, you can see tree trunks and their leaves. The idiom? "Can't see the wood for the trees".
• #038 - Heist: With the USA Dollar matching image 1, it was a simple matter of Google Imaging the rest: the Euro matches to image 2, the Australian Dollar matching to image 3, the Indonesian Rupiah matching to image 5, and Japanese Yen matches to the final image 4. BooOorriIing.
• #034 - 4 Colour Theorems: Gah, you know, I remember seeing a simpler version of this question in math or geography class or some such and absolutely hating it. I still hatesss this question. The four color theorem "states that given any plane separated into regions, such as a political map of the counties of a state, the regions may be colored using no more than four colors in such a way that no two adjacent regions receive the same color." The answer is "yellow" but, and I suspect they'll be more like this as the cards go on, I can't rationalize why. Given enough effort with Photoshop or markers, I could Playskool all the colors in myself to "prove" it. But I'd still hatesss it.
• #040 - Baby on Board: MmMm, more search engine love. Dolphins could be pregant for 10 to 12 months (276 days) and lions for "one hundred to one hundred twenty days" (108 days from the available options). Rhinos have a long pregnancy at 15 to 18 months (450 days from the available options), and rabbits for 28 to 35 days (32 days from the available options). Mice snatch up the remaining 21 days, which leaves our own Fijjit Mejora at 640.