This was a super fun book! My favorite parts were the anecdotes of, and research reports about, animal play. A few favorite moments:
“Romanes’ 1882 work Animal Intelligence, overflows with anecdotes: a baboon taking revenge, an elephant concealing a theft, birds engaging in piracy, and swans demonstrating conjugal fidelity.”
“Gorilla mothers don't just nurse, protect, cuddle, and groom their infants. They also play with them. They swing them, engage them in peekaboo, and, as many a delighted human observer can attest, treat them to the kinetic pleasures of "airplane."”
“A worker at the Senckenberg Research Institute and Natural History Museum who fed redeye and rudd coaxed them to rest in his hand as he held it near the water's surface. The worker then began to lift the fish from the water and toss them back in. For the fish, the experience was evidently pleasurable, since most swam back to the worker's hand and allowed themselves to be tossed again.”
“Although we have not made sustained or concerted efforts to preserve the culture of birds, one bird for a brief period may have preserved part of our own. Darwin: "The partial and complete extinction of many races and sub-races of man are historically known events. Humboldt saw in South America a parrot which was the sole living creature that could speak the language of a lost tribe." Descent of Man, pt. 1, 236.”
“In 1988 a female bottlenose dolphin named Billie was rescued from a polluted creek near Adelaide, Australia, and housed temporarily at a local marine mammal park. There she kept company with five other dolphins. The others, so they might make public performances, had been trained to "tail-walk"-forcing most of their bodies vertically out of the water and maintaining the position by vigorously pumping their tails. Billie was never given such training, but she observed the others as they rehearsed and performed. Some weeks after her rescue she was returned to the wild. She was later sighted in the open ocean, tail-walking with a female dolphin named Wave. Other dolphins in the pod were sighted tail-walking, too.”
“Romanes announced triumphantly, "I have now got a monkey. Sclater let me choose one from the Zoo, and it is a very intelligent, affectionate little animal." Then, in the sentence following, he acknowledged a minor difficulty: "I wanted to keep it in the nursery for purposes of comparison, but the proposal met with so much opposition that I had to give way."
One assumes that the opposition arose from Mrs. Romanes.
Fortunately, for both the general advancement of scientific inquiry as well as the Romanes marriage, Romanes's sister Charlotte, who lived near him, was willing to keep the monkey and take notes for her brother, giving particular attention to behavior that signified intelligence. On December 18, 1880, a tufted capuchin (Cebus apella fatullus) was delivered to her well-appointed apartments in the City of Westminster, where it resided for ten weeks. During that time the monkey enjoyed much of what Groos would call the pleasure of having an effect, and quite often that effect was chaos.”
“A young male elephant was said to wait high on an embankment as two others climbed the slope. When they were halfway up, he sat on his haunches, slid, and collided—it seemed deliberately-with one of the others, who then slid with him. Upon reaching the bottom, they both headed back up the embankment, but the third elephant was now sliding down the slope. He collided with them, and all three ended at the bottom in a great muddy heap.”
“…after launching themselves from the branch, [patas monkeys] spread-eagled and belly flopped onto the ground with [loud thuds]. The hard landings were not accidental. Far from it. Each monkey, after taking a moment to regain his composure, climbed the tree and did it again—at least ten more times.”